Common use of Change of Method Clause in Contracts

Change of Method. Without limiting the terms of this Agreement (a) Viking and Camber shall be empowered, upon their mutual agreement, at any time prior to the Effective Time, to change the method or structure of effecting the combination of Viking and Camber (including the provisions of ARTICLE I), if and to the extent they both deem such change to be necessary, appropriate or desirable or (b) if, at any time during the period beginning on the date that is forty (40) days after the date of this Agreement and ending on the later of (x) the time that the S-4 shall have become effective under the Securities Act and (y) the date that is sixty (60) days after the date of this Agreement, either of the Boards of Directors of Camber or Viking determines in good faith that a change in the structure of effecting the combination of Viking and Camber to a Direct Merger would be in the best interests of the Combined Company following the Merger, upon written notice to the other party of such determination, Camber and Viking shall take all action necessary, and cooperate in good faith, to effect such change in structure, including by making effective amendments to this Agreement (including the provisions of ARTICLE I) and to the S-4 to the extent necessary in connection therewith, provided that such notice may only be delivered following good faith consultation with the other party; provided, however, that no such change shall (i) alter or change the Exchange Ratio or the number of shares of Camber Common Stock received by holders of shares of Viking Common Stock in exchange for each share of Viking Common Stock, unless, in connection with any change effected pursuant to the foregoing clause (b), the economic benefits that are intended to accrue to Camber’s stockholders and Viking’s stockholders pursuant to the terms of this Agreement and the transactions contemplated hereby are identical in all but de minimis respects, (ii) adversely affect the Tax treatment of Camber’s stockholders or Viking’s stockholders pursuant to this Agreement, (iii) adversely affect the Tax treatment of Viking, Camber, the Combined Company and/or their respective Subsidiaries pursuant to this Agreement, or (iv) would reasonably be expected to prevent the consummation of the transactions contemplated by this Agreement or delay the consummation of such transactions beyond the Termination Date. The parties agree to reflect any such change in an appropriate amendment to this Agreement executed by both parties in accordance with Section 9.1.

Change of Method. Without limiting the terms of this Agreement (a) Viking and Camber shall be empowered, upon their mutual agreement, at any time prior to the Effective Time, to change the method or structure of effecting the combination of Viking and Camber (including the provisions of ARTICLE I), if and to the extent they both deem such change to be necessary, appropriate or desirable or (b) if, at any time during the period beginning on the date that is forty (40) days after the date of this Agreement February 15, 2021 and ending on the later of (x) the time that the S-4 shall have become effective under the Securities Act and (y) the date that is sixty (60) days after the date of this AgreementFebruary 15, 2021, either of the Boards of Directors of Camber or Viking determines in good faith that a change in the structure of effecting the combination of Viking and Camber to a Direct Merger would be in the best interests of the Combined Company following the Merger, upon written notice to the other party of such determination, Camber and Viking shall take all action necessary, and cooperate in good faith, to effect such change in structure, including by making effective amendments to this Agreement (including the provisions of ARTICLE I) and to the S-4 to the extent necessary in connection therewith, provided that such notice may only be delivered following good faith consultation with the other party; provided, however, that no such change shall (i) alter or change the Exchange Ratio or the number of shares of Camber Common Stock received by holders of shares of Viking Common Stock in exchange for each share of Viking Common Stock or the number of shares of New Camber Preferred received by the holders of shares of Viking Preferred Stock in exchange for each share of Viking Preferred Stock, unless, in connection with any change effected pursuant to the foregoing clause (b), the economic benefits that are intended to accrue to Camber’s stockholders and Viking’s stockholders pursuant to the terms of this Agreement and the transactions contemplated hereby are identical in all but de minimis respects, (ii) adversely affect the Tax treatment of Camber’s stockholders or Viking’s stockholders pursuant to this Agreement, (iii) adversely affect the Tax treatment of Viking, Camber, the Combined Company and/or their respective Subsidiaries pursuant to this Agreement, or (iv) would reasonably be expected to prevent the consummation of the transactions contemplated by this Agreement or delay the consummation of such transactions beyond the Termination Date. The parties agree to reflect any such change in an appropriate amendment to this Agreement executed by both parties in accordance with Section 9.1.. February 2021 - Agreement and Plan of Merger

Change of Method. Without limiting the terms of this Agreement (a) Viking and Camber shall be empowered, upon their mutual agreement, at any time prior to the Effective Time, to change the method or structure of effecting the combination of Viking and Camber (including the provisions of ARTICLE I), if and to the extent they both deem such change to be necessary, appropriate or desirable or (b) if, at any time during the period beginning on the date that is forty (40) days after February 15, 2021 the date of this Agreement hereof and ending on the later of (x) the time that the S-4 shall have become effective under the Securities Act and (y) the date that is sixty (60) days after February 15, 2021 the date of this Agreementhereof, either of the Boards of Directors of Camber or Viking determines in good faith that a change in the structure of effecting the combination of Viking and Camber to a Direct Merger would be in the best interests of the Combined Company following the Merger, upon written notice to the other party of such determination, Camber and Viking shall take all action necessary, and cooperate in good faith, to effect such change in structure, including by making effective amendments to this Agreement (including the provisions of ARTICLE I) and to the S-4 to the extent necessary in connection therewith, provided that such notice may only be delivered following good faith consultation with the other party; provided, however, that no such change shall (i) alter or change the Exchange Ratio or the number of shares of Camber Common Stock received by holders of shares of Viking Common Stock in exchange for each share of Viking Common Stock or the number of shares of New Camber Preferred received by the holders of shares of Viking Preferred Stock in exchange for each share of Viking Preferred Stock, unless, in connection with any change effected pursuant to the foregoing clause (b), the economic benefits that are intended to accrue to Camber’s stockholders and Viking’s stockholders pursuant to the terms of this Agreement and the transactions contemplated hereby are identical in all but de minimis respects, (ii) adversely affect the Tax treatment of Camber’s stockholders or Viking’s stockholders pursuant to this Agreement, (iii) adversely affect the Tax treatment of Viking, Camber, the Combined Company and/or their respective Subsidiaries pursuant to this Agreement, or (iv) would reasonably be expected to prevent the consummation of the transactions contemplated by this Agreement or delay the consummation of such transactions beyond the Termination Date. The parties agree to reflect any such change in an appropriate amendment to this Agreement executed by both parties in accordance with Section 9.1.. February 2021 - April 2023 – First Amendment to

Change of Method. Without limiting the terms of this Agreement (a) Viking and Camber shall be empowered, upon their mutual agreement, at any time prior to the Effective Time, to change the method or structure of effecting the combination of Viking and Camber (including the provisions of ARTICLE I), if and to the extent they both deem such change to be necessary, appropriate or desirable or (b) if, at any time during the period beginning on the date that is forty (40) days after the date of this Agreement February 3, 2020 and ending on the later of (x) the time that the S-4 shall have become effective under the Securities Act and (y) the date that is sixty (60) days after the date of this AgreementFebruary 3, 2020, either of the Boards of Directors of Camber or Viking determines in good faith that a change in the structure of effecting the combination of Viking and Camber to a Direct Merger would be in the best interests of the Combined Company following the Merger, upon written notice to the other party of such determination, Camber and Viking shall take all action necessary, and cooperate in good faith, to effect such change in structure, including by making effective amendments to this Agreement (including the provisions of ARTICLE I) and to the S-4 to the extent necessary in connection therewith, provided that such notice may only be delivered following good faith consultation with the other party; provided, however, that no such change shall (i) alter or change the Exchange Ratio or the number of shares of Camber Common Stock received by holders of shares of Viking Common Stock in exchange for each share of Viking Common Stock or the number of shares of New Camber Preferred received by the holders of shares of Viking Preferred Stock in exchange for each share of Viking Preferred Stock, unless, in connection with any change effected pursuant to the foregoing clause (b), the economic benefits that are intended to accrue to Camber’s stockholders and Viking’s stockholders pursuant to the terms of this Agreement and the transactions contemplated hereby are identical in all but de minimis respects, (ii) adversely affect the Tax treatment of Camber’s stockholders or Viking’s stockholders pursuant to this Agreement, (iii) adversely affect the Tax treatment of Viking, Camber, the Combined Company and/or their respective Subsidiaries pursuant to this Agreement, or (iv) would reasonably be expected to prevent the consummation of the transactions contemplated by this Agreement or delay the consummation of such transactions beyond the Termination Date. The parties agree to reflect any such change in an appropriate amendment to this Agreement executed by both parties in accordance with Section 9.1.