Document

Pursuant to the terms and conditions of the Celanese Corporation Amended and Restated 2018 Global Incentive Plan, you have been awarded Time-Based Restricted Stock Units, subject to the restrictions described in this Agreement. In addition to the information included in this Award Agreement, the Participant’s name and the number of Restricted Stock Units can be found in the Grant Summary located in the electronic stock plan award administration system maintained by the Company or its designee that contains a link to this Agreement (which summary information is set forth in the appropriate records of the Company authorizing such award)

This Time-Based Restricted Stock Unit Award Agreement (the "Agreement") is made and entered into as of [Grant Date] (the "Grant Date"), by and between Celanese Corporation, a Delaware corporation ("Celanese" and together with the participating subsidiaries that are employers of the Participants, the "Company") (the "Company"), and [Participant Name] (the "Participant"). Capitalized terms used, but not otherwise defined, herein shall have the meanings ascribed to such terms in the Celanese Corporation Amended and Restated 2018 Global Incentive Plan (as amended from time to time, the "2018 Plan").

1.Time-Based RSU Award: In order to encourage the Participant's contribution to the successful performance of the Company, the Company hereby grants to the Participant as of the Grant Date, pursuant to the terms of the 2018 Plan and this Agreement, an award (the "Award") of [Number of Shares Granted] time-based Restricted Stock Units ("RSUs") representing the right to receive an equal number of Common Shares upon vesting. The Participant hereby acknowledges and accepts such Award upon the terms and subject to the conditions, restrictions and limitations contained in this Agreement and the 2018 Plan.

2.Time-Based Vesting: Subject to Section 3 and Section 6 of this Agreement, <<Vest1>> RSUs shall vest on <<Vest1Date>>; <<Vest2>> RSUs shall vest on <<Vest2Date>>; <<Vest3>> RSUs shall vest on <<Vest3Date>>, for a total of [Number of Shares Granted] RSUs. Each such date shall be referred to as a "Vesting Date". Each period between the Grant Date and a Vesting Date shall be referred to as a "Vesting Period".

(a)Upon the termination of the Participant's employment by the Company without Cause (other than as provided in Section 3(b), 3(c), 3(d) or 6(a)(1)), a prorated portion of the RSUs that remain unvested will vest in an amount equal to (i) the unvested RSUs in each Vesting Period multiplied by (ii) a fraction, the numerator of which is the number of complete and partial calendar months from the Grant Date to the date of termination without Cause, and the denominator of which is the number of complete and partial calendar months in each applicable Vesting Period, such product to be rounded up to the nearest whole number. In any such case, such prorated number of unvested RSUs that vest in accordance with the preceding sentence will be subject to any applicable taxes under Section 7 upon such vesting, which may be rounded up in each case to avoid fractional shares. In the case of termination of the Participant's employment by the Company without Cause (other than as provided in Section 3(b), 3(c), 3(d) or 6(a)(1)), the prorated RSUs will be settled in accordance with the provisions of Section 4 following the applicable Vesting Date(s).

(b)Upon the termination of the Participant's employment by the Company due to the Participant's death or Disability (other than as provided in Section 3(c) or 3(d)), a prorated portion of the RSUs that remain unvested will vest in an amount equal to (i) the unvested RSUs in each Vesting Period multiplied by (ii) a fraction, the numerator of which is the number of complete

and partial calendar months from the Grant Date to the date of termination due to the Participant's death or Disability, and the denominator of which is the number of complete and partial calendar months in each applicable Vesting Period, such product to be rounded up to the nearest whole number. In any such case, such prorated number of unvested RSUs that vest in accordance with the preceding sentence will be subject to any applicable taxes under Section 7 upon such vesting, which may be rounded up in each case to avoid fractional shares. In the case of termination of the Participant's employment due to the Participant's death or Disability and notwithstanding any provision of Section 4 to the contrary, the prorated RSUs will be settled as soon as administratively practicable (but in no event later than 2 ½ months) after the date of such termination of employment due to death or Disability by delivery of a number of Common Shares equal to the number of such prorated RSUs.

(c)Upon the termination of the Participant's employment by the Company due to the Participant's Retirement but under circumstances not amounting to Cause and, unless the Participant serves in a Designated Role, as such term is defined by, and such roles are determined from time to time by, the Committee, subject to the Participant providing two (2) months’ prior written notice of such Participant's Retirement, then the Participant will continue to vest in the RSUs in accordance with the above vesting schedule. To the extent permitted by applicable country, state or province law, as consideration for the vesting provisions upon Retirement contained in this Section 3(c), upon Retirement, the Participant shall enter into a departure and general release of claims agreement with the Company that includes two-year noncompetition and non-solicitation covenants in a form acceptable to the Company.

(d)Notwithstanding any provision herein to the contrary, if the Participant's employment with the Company is terminated by the Company in connection with a Qualifying Disposition, as determined by the Company in its sole discretion, other than for Cause, and regardless of whether the Participant is then eligible for Retirement or is offered employment with the acquiror or successor, then the entire unvested portion of the RSUs shall vest as of the date of such termination of employment and shall be settled as follows, subject to any applicable taxes under Section 7:

(ii) unless the Company determines, in its sole discretion, that (A) the Participant has been offered employment with the acquiror or successor and in connection with that employment will receive a substitute award from the acquiror or successor with an equivalent (or greater) economic value and no less favorable vesting conditions as this Award and (B) only the additional accelerated vesting provisions of Section 3(d)(i) shall apply, the remaining number of the unvested RSUs shall be settled in accordance with the provisions of Section 4 following the applicable Vesting Date(s).

A Participant's employment will be considered to have been terminated for Cause, and the Award forfeited and cancelled without consideration, if the Company determines, in its sole discretion, that the Participant engaged in an act constituting Cause at any time prior to a Vesting Date, regardless of whether the Participant's termination initially was considered to have been without Cause. In such case, the provisions of Section 3(a), 3(b), 3(c), 3(d) and 6(a)(1) are inapplicable.

4.Settlement of RSUs: Subject to Sections 3, 6 and 7 of this Agreement, Celanese shall deliver to the Participant (or to a Company-designated brokerage firm or plan administrator) as soon as administratively practicable following the applicable Vesting Date (but in no event later than 2 ½ months after the applicable Vesting Date), in complete settlement of all RSUs vesting on such Vesting Date, a number of Common Shares equal to the number of RSUs vesting on such Vesting Date.

(1) If (i) the Award is assumed or continued or if a substitute award with an equivalent (or greater) economic value and no less favorable vesting conditions is granted to the Participant in connection with the occurrence of a Change in Control, and (ii) the Participant's employment is terminated by the Company (or its successor) without Cause within two years following the Change in Control, then the unvested portion of the Award (or, as applicable, the substitute award) shall immediately vest and a number of Common Shares equal to the number of unvested RSUs shall be delivered to the Participant within thirty (30) days following the date of termination, subject to the provisions of Section 7, provided, however, that if the Participant could have terminated due to the Participant's Retirement, then the RSUs shall instead be settled in accordance with the provisions of Section 4 following the applicable Vesting Date(s).

(2) If the Award is not assumed or continued and a substitute award is not made pursuant to Section 6(a)(1) above, then upon the occurrence of a Change in Control, the unvested portion of the Award shall immediately vest and a number of Common Shares equal to the number of unvested RSUs shall be delivered to the Participant within thirty (30) days following the Change in Control, subject to the provisions of Section 7; and

(b)Notwithstanding any other provision of this Agreement to the contrary, in the event of a corporate dissolution of Celanese that is taxed under Section 331 of the Internal Revenue Code of 1986, as amended, then in accordance with Treasury Regulation Section 1.409A-3(j)(4)(ix)(A), this Agreement shall terminate and any RSUs granted pursuant to this Agreement that have not previously been forfeited shall immediately become Common Shares and shall be delivered to the Participant within thirty (30) days following such dissolution.

counterpart thereof) and applicable employment taxes. Unless otherwise permitted by the Committee, withholding shall be effectuated by withholding Common Shares in connection with the vesting and/or settlement of RSUs. Withholding shall be effected using a rate or method chosen by the Company consistent with ASC Topic 718 (or any successor applicable equity accounting standard applicable to this Award) and the U.S. Internal Revenue Service withholding regulations or other applicable tax requirements, not to exceed maximum statutory rates. The Participant acknowledges that the Company shall have the right to deduct any taxes required to be withheld by law in connection with the delivery of Common Shares issued in respect of any vested RSUs from any amounts payable by it to the Participant (including, without limitation, future cash wages). The Participant acknowledges and agrees that amounts withheld by the Company for taxes may be less than amounts actually owed for taxes by the Participant in respect of the Award. Any vested RSUs shall be reflected in the Company's records as issued on the respective dates of issuance set forth in this Agreement, irrespective of whether delivery of such Common Shares is pending the Participant's satisfaction of his or her withholding tax obligations.

8.Securities Laws: The Company may impose such restrictions, conditions or limitations as it determines appropriate as to the timing and manner of any resales by the Participant or other subsequent transfers by the Participant of any Common Shares issued as a result of the vesting or settlement of the RSUs, including without limitation (a) restrictions under an insider trading policy, and (b) restrictions as to the use of a specified brokerage firm for such resales or other transfers. Upon the acquisition of any Common Shares pursuant to the vesting or settlement of the RSUs, the Participant will make or enter into such written representations, warranties and agreements as the Company may reasonably request in order to comply with applicable securities laws or with this Agreement and the 2018 Plan. All accounts in which such Common Shares are held or any certificates for Common Shares shall be subject to such stop transfer orders and other restrictions as the Company may deem advisable under the rules, regulations and other requirements of the Securities and Exchange Commission, any stock exchange or quotation system upon which the Common Shares are then listed or quoted, and any applicable federal or state securities law, and the Company may cause a legend or legends to be put on any such certificates (or other appropriate restrictions and/or notations to be associated with any accounts in which such Common Shares are held) to make appropriate reference to such restrictions.

9.Non-Transferability of Award: The RSUs may not be assigned, alienated, pledged, attached, sold or otherwise transferred or encumbered by the Participant other than by will or by the laws of descent and distribution, and any such purported assignment, alienation, pledge, attachment, sale, transfer or encumbrance shall be void and unenforceable against the Company; provided, that the Participant may designate a beneficiary, on a form provided by the Company, to receive any portion of the Award payable hereunder following the Participant's death.

10.Other Agreements: Subject to Sections 10(a) and 10(b) of this Agreement, this Agreement and the 2018 Plan constitute the entire understanding between the Participant and the Company regarding the Award, and any prior and/or contemporaneous agreements, understandings, representations, discussions, commitments or negotiations concerning the Award, whether written or oral, are superseded. No oral statements or other prior written material not specifically incorporated into this Agreement, other than the 2018 Plan, shall be of any force or effect.

(3) shall be subject to policies and agreements adopted by the Company from time to time, and applicable laws and regulations, requiring the repayment by the Participant of incentive compensation under certain circumstances, including that certain (i) Celanese Corporation Incentive-Based Compensation Recoupment (Clawback) Policy (Financial Restatements) (as applicable) adopted by the Committee on October 18, 2023 and (ii) Celanese Corporation Amended and Restated Incentive Compensation Recoupment Policy (Detrimental Conduct; Violations of Restrictive Covenants) adopted by the Committee on October 18, 2023 (collectively, "Clawback Policies"), without any further act or deed or consent of the Participant; and

(4) shall have delivered to the Company an executed copy of the current form of Long-Term Incentive Claw-Back Agreement. For purposes hereof, "Long-Term Incentive Claw-Back Agreement" means an agreement between the Company and the Participant associated with the grant of long-term incentives of the Company, which contains terms, conditions, restrictions and provisions regarding one or more of (i) noncompetition by the Participant with the Company, and its customers and clients; (ii) non-solicitation and non-hiring by the Participant of the Company's employees, former employees or consultants; (iii) maintenance of confidentiality of the Company's and/or clients' information, including intellectual property; (iv) nondisparagement of the Company; and (v) such other matters deemed necessary, desirable or appropriate by the Company for such an agreement in view of the rights and benefits conveyed in connection with an award.

(b)The Participant acknowledges that if the Participant violates any of the terms or provisions of the Clawback Policies or the Long-Term Incentive Claw-Back Agreement, whether before or after termination of employment, then the Company will, to the fullest extent permitted by applicable law, (i) terminate the Participant's rights in any unvested RSUs under this Award, and (ii) claw back (i.e., recover) all Common Shares previously issued under this Award.

(c)If the Participant is a non-resident of the U.S., there may be an addendum containing special terms and conditions applicable to awards in the Participant's country ("International Supplement"), which terms are deemed incorporated herein. The issuance of the Award to any such Participant is contingent upon the Participant executing and returning any such addendum in the manner directed by the Company, if required.

11.Not a Contract for Employment; No Acquired Rights; Agreement Changes: Nothing in the 2018 Plan, this Agreement or any other instrument executed in connection with the Award shall confer upon the Participant any right to continue in the Company's employ or service nor limit in any way the Company's right to terminate the Participant's employment at any time for any reason. The grant of RSUs hereunder, and any future grant of awards to the Participant under the 2018 Plan, is entirely voluntary and at the complete and sole discretion of the Company. Neither the grant of these RSUs nor any future grant of awards by the Company shall be deemed to create any obligation to grant any further awards, whether or not such a reservation is expressly stated at the time of such grants. The Company has the right, at any time and for any reason, to amend, suspend or terminate the 2018 Plan; provided, however, that no such amendment, suspension, or termination shall adversely affect the Participant's rights hereunder.

12.Severability: In the event that any provision of this Agreement is declared to be illegal, invalid or otherwise unenforceable by a court of competent jurisdiction, such provision shall be reformed, if possible, to the extent necessary to render it legal, valid and enforceable, or otherwise deleted, and the remainder of this Agreement shall not be affected except to the extent necessary to reform or delete such illegal, invalid or unenforceable provision.

15.Electronic Delivery: By executing this Agreement, the Participant hereby consents to the delivery of any and all information (including, without limitation, information required to be delivered to the Participant pursuant to applicable securities laws), in whole or in part, regarding Celanese and its subsidiaries, the 2018 Plan, and the Award via electronic mail, the Company's or a plan administrator's web site, or other means of electronic delivery.

16.Personal Data: By accepting the Award under this Agreement, the Participant hereby consents to the Company's use, dissemination and disclosure of any information pertaining to the Participant that the Company determines to be necessary or desirable for the implementation, administration and management of the 2018 Plan.

(a)Governing Law. Notwithstanding the place where this Agreement may be executed by any of the parties hereto, the parties expressly agree that all the terms and provisions hereof shall be governed by, construed under and interpreted in accordance with the laws of the State of Delaware, without regard to its conflicts of laws rules.

The Participant agrees that the following provisions requiring arbitration, prohibiting recovery of attorneys' fees, waiving class actions and mass actions, waiving the right to a jury trial, waiving any right to seek punitive damages, limiting actual damages, and limiting remedies by waiving any right to injunctive or other equitable or legal relief are and were an important part of the Company's decision to adopt the Operative Documents and for Participant to be offered this Agreement. The Participant understands and agrees that absent the foregoing provisions, the Operative Documents would not have been offered or entered into or would have materially changed. The Participant acknowledges the benefits of receiving potential incentive awards. In reliance on the Participant's intent to abide by and enter into the following provisions, the parties have entered into the Operative Documents.

(c)MANDATORY ARBITRATION. All disputes arising out of or related in any manner to the Operative Documents shall be resolved exclusively by arbitration to be conducted only in the county and state of Dallas, Texas in accordance with the rules of the International Institute for Conflict Prevention and Resolution Rules for Non-Administered Arbitration ("CPR") applying the laws of Delaware and by a sole arbitrator. Within 45 days of the service of any demand for arbitration, the parties shall attempt to mutually agree on the appointment of an arbitrator and may seek names of potential arbitrators from CPR for their consideration. Failing agreement on selection of an agreed arbitrator, upon written request of either party, CPR shall appoint a single arbitrator in accordance with its rules, with the parties expressing a contractual preference for the selection of a retired judge with at least 10 years of judicial experience. Discovery shall be as provided by the CPR rules. The arbitration award shall be in writing and shall include a reasoned opinion by the Arbitrator. Consistent with the waiver of all claims to

punitive or exemplary damages, the Arbitrator shall have no authority to award such damages. The parties understand that their right to appeal or to seek modification of any ruling or award of the arbitrator is severely limited, if any. Awards issued by the arbitrator shall be final and binding, and judgment may be entered on it in any court of competent jurisdiction. All parties shall keep confidential the fact of the arbitration, the dispute being arbitrated, and the decision of the arbitrator. Any and all disputes regarding this arbitration provision and its enforceability shall be exclusively submitted to the United States District Court for the District of Delaware, if it has jurisdiction, and failing that, to the Delaware state court in Wilmington, Delaware.

(d)NO RECOVERY OF ATTORNEYS' FEES AND COSTS. Each party agrees that in any litigation or proceeding between the parties arising out of, connected with, related to, or incidental to the relationship between them in connection with the Operative Documents, each party shall bear all of its own attorneys' fees and costs regardless of which party prevails, except when prohibited by applicable law.

(e)CLASS ACTION AND MASS ACTION WAIVER. As part of this provision of arbitration as the contracted method of all dispute resolution under this Agreement, any claim, whether brought in a court of law or in arbitration, must be brought in the Participant's individual capacity, and not as a representative of any purported class or as a "mass action" (involving multiple plaintiffs) ("Class/Mass Action"). The parties expressly waive any ability to maintain any Class/Mass Action in any forum. The arbitrator shall not have authority to combine or aggregate similar claims or conduct any Class/Mass Action nor make an award to any person or entity not a party to the arbitration. Any claim that all or part of this Class/Mass Action waiver is unenforceable, unconscionable, void, or voidable may be determined only by a court of competent jurisdiction and not by an arbitrator. The Participant understands that but for this Agreement, he or she would have had a right to litigate through a court, to have a judge or jury decide the case and to be party to a Class/Mass Action. However, in exchange for the potential incentive awards provided herein and the receipt of the benefit of arbitration, the Participant understands and chooses to have only his or her individual claims decided, each in a separate case, by an arbitrator.

(h)LIMIT ON ACTUAL DAMAGES. In no event may the actual damages awarded to the Participant in a dispute arising out of or relating to the Operative Documents exceed the Fair Market Value of the award amount set forth on the first page of this Agreement as of the vesting date, reduced by the value of any shares or payments previously received under this Agreement (the "Damages Limit"). The Participant knowingly, voluntarily and irrevocably waives and releases any claim to damages in excess of this Damages Limit.

(i)LIMITATION OF REMEDIES. Except when prohibited by applicable law, the procedures and remedies set forth in this Agreement shall constitute the sole remedies available to the Participant. In no event shall the Participant seek equitable relief, injunctive relief, or otherwise bring claims directly or derivatively for ultra vires, corporate waste, breach of

fiduciary duty, or any other claim or cause of action, whether legal or equitable, sounding in contract or tort. Nothing in this clause is intended to waive or limit any claim brought pursuant to any federal or state statute related to the protection of civil rights. Should any provision in this Agreement be found by a court of competent jurisdiction, after all appellate rights are exhausted, to be unenforceable or void, the Parties expressly agree to sever such provision and to otherwise proceed to dispute resolution with the remaining provisions in the Mandatory Arbitration provisions.

18.Restricted Stock Units Subject to Plan: By entering into this Agreement the Participant agrees and acknowledges that the Participant has received and read a copy of the 2018 Plan and the 2018 Plan's prospectus. The RSUs and the Common Shares issued upon vesting of such RSUs are subject to the 2018 Plan, which is hereby incorporated by reference. In the event of any conflict between any term or provision of this Agreement and a term or provision of the 2018 Plan, the applicable terms and provisions of the 2018 Plan shall govern and prevail.

19.Validity of Agreement: This Agreement shall be valid, binding and effective upon the Company on the Grant Date. However, the Participant must accept this Agreement electronically pursuant to the online acceptance procedure established by the Company within ninety (90) days; otherwise the Company may, in its sole discretion, rescind the Award in its entirety.

21.Compliance with Section 409A of the Internal Revenue Code: Notwithstanding any provision in this Agreement to the contrary, this Agreement will be interpreted and applied so that the Agreement does not fail to meet, and is operated in accordance with, the requirements of Section 409A of the Code. The Company reserves the right to change the terms of this Agreement and the 2018 Plan without the Participant's consent to the extent necessary or desirable to comply with the requirements of Code Section 409A. Further, in accordance with the restrictions provided by Treasury Regulation Section 1.409A-3(j)(2), any subsequent amendments to this Agreement or any other agreement, or the entering into or termination of any other agreement, affecting the RSUs provided by this Agreement shall not modify the time or form of issuance of the RSUs set forth in this Agreement. In addition, if the Participant is a "specified employee" within the meaning of Code Section 409A, as determined by the Company, any payment made in connection with the Participant's separation from service shall not be made earlier than six (6) months and one day after the date of such separation from service to the extent required by Code Section 409A. For purposes of Section 409A of the Code, references herein to the Participant's "termination of employment" shall refer to the Participant's "separation from service" with the Company within the meaning of Section 409A of the Code.

(a)"Cause" means, as determined by the Company in its sole discretion, (i) the Participant's willful failure to perform the Participant's duties to the Company (other than as a result of total or partial incapacity due to physical or mental illness) for a period of 30 days following written notice by the Company to the Participant of such failure, (ii) the Participant's conviction of, or a plea of nolo contendere to, (x) a felony under the laws of the United States or any state thereof or any similar criminal act in a jurisdiction outside the United States or (y) a crime involving moral turpitude, (iii) the Participant's willful malfeasance or willful misconduct which is demonstrably injurious to the Company or its affiliates, (iv) any act of fraud by the Participant, (v) any violation of the Company's business conduct policy, (vi) any violation of the

Company's policies concerning harassment or discrimination by the Participant, (vii) the Participant's conduct that causes harm to the business reputation of the Company or its affiliates, or (viii) the Participant's breach of any confidentiality, intellectual property, noncompetition or non-solicitation provisions applicable to the Participant under the Long-Term Incentive Claw-Back Agreement or any other agreement between the Participant and the Company. "Cause" shall be determined by the Company in its sole discretion, and such determination shall be final, binding, and conclusive on the Participant.

(i) Any individual, entity or group (within the meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")) (a "Person") becomes the beneficial owner (within the meaning of Rule 13d-3 promulgated under the Exchange Act) of 30% or more of either (A) the then-outstanding shares of common stock of Celanese (the "Outstanding Celanese Common Stock") or (B) the combined voting power of the then-outstanding voting securities of Celanese entitled to vote generally in the election of directors (the "Outstanding Celanese Voting Securities"); provided, however, that, for purposes of this subparagraph, the following acquisitions shall not constitute a Change in Control: (i) any acquisition directly from the Company, (ii) any acquisition by the Company, (iii) any acquisition by any employee benefit plan (or related trust) sponsored or maintained by the Company or any Affiliate, or (iv) any acquisition pursuant to a transaction that complies with clauses (A), (B) or (C) in paragraph (iii) of this definition; or

(ii) Individuals who, as of the effective date of this Agreement, constitute the Board (the "Incumbent Board") cease for any reason to constitute at least a majority of the Board; provided, however, that any individual becoming a director subsequent to the effective date of this Agreement whose election, or nomination for election by Celanese's stockholders, was approved by a vote of at least a majority of the directors then comprising the Incumbent Board shall be considered as though such individual was a member of the Incumbent Board, but excluding, for this purpose, any such individual whose initial assumption of office occurs as a result of an actual or threatened election contest with respect to the election or removal of directors or other actual or threatened solicitation of proxies or consents by or on behalf of a Person other than the Board; or

(iii) Consummation of a reorganization, merger, statutory share exchange or consolidation or similar transaction involving Celanese or any of its subsidiaries, a sale or other disposition of all or substantially all of the assets of Celanese, or the acquisition of assets or stock of another entity by Celanese or any of its subsidiaries (each, a "Business Combination"), in each case unless, following such Business Combination, (A) all or substantially all of the individuals and entities that were the beneficial owners of the Outstanding Celanese Common Stock and the Outstanding Celanese Voting Securities immediately prior to such Business Combination beneficially own, directly or indirectly, more than 50% of the then-outstanding shares of common stock (or, for a non-corporate entity, equivalent securities) and the combined voting power of the then-outstanding voting securities entitled to vote generally in the election of directors (or, for a non-corporate entity, equivalent governing body), as the case may be, of the entity resulting from such Business Combination (including, without limitation, an entity that, as a result of such transaction, owns Celanese or all or substantially all of Celanese's assets either directly or through one or more subsidiaries) in substantially the same proportions as their ownership immediately prior to such Business Combination of the Outstanding Celanese Common Stock and the Outstanding Celanese Voting Securities, as the case

may be, (B) no Person (excluding any corporation resulting from such Business Combination or any employee benefit plan (or related trust) of the Company or such corporation resulting from such Business Combination) beneficially owns, directly or indirectly, 30% or more of, respectively, the then-outstanding shares of common stock of the corporation resulting from such Business Combination or the combined voting power of the then-outstanding voting securities of such corporation, except to the extent that such ownership existed prior to the Business Combination, and (C) at least a majority of the members of the board of directors (or, for a non-corporate entity, equivalent governing body) of the entity resulting from such Business Combination were members of the Incumbent Board at the time of the execution of the initial agreement or of the action of the Board providing for such Business Combination; or

Notwithstanding the foregoing, if it is determined that an Award hereunder is subject to the requirements of Section 409A and the Change in Control is a "payment event" under Section 409A for such Award, Celanese will not be deemed to have undergone a Change in Control unless Celanese is deemed to have undergone a "change in control event" pursuant to the definition of such term in Section 409A.

(c)"Disability" has the same meaning as "Disability" in the Celanese Corporation 2008 Deferred Compensation Plan or such other meaning as determined by the Committee in its sole discretion, provided that in all events a "Disability" under this Agreement shall constitute a "disability" within the meaning of Treasury Regulation Section 1.409A-3(i)(4).

(e)"Qualifying Disposition" means a sale or other disposition by the Company or one or more subsidiaries of all or part of a business, business unit, segment or subsidiary in a stock, asset, merger or other similar transaction or combination thereof, and determined by the Committee to be a Qualifying Disposition; provided, however, that no Change in Control shall be considered a Qualifying Disposition.

(f) "Retirement" of the Participant shall mean a voluntary separation from service on or after the date when the Participant is both 55 years of age and has ten years of service with the Company, as determined by the Company in its discretion based on payroll records. Retirement shall not include voluntary separation from service in which the Company could have terminated the Participant's employment for Cause.