(4)(i) Agree to an equitable adjustment as provided in the Changes clause of this contract if the contract cost is affected by a change which, pursuant to paragraph (a)(3) of this clause, the Contractor is required to make to the Contractor’s established cost accounting practices.

(ii) Negotiate with the Contracting Officer to determine the terms and conditions under which a change may be made to a cost accounting practice, other than a change made under other provisions of paragraph (a)(4) of this clause; provided that no agreement may be made under this provision that will increase costs paid by the United States.

(iii) When the parties agree to a change to a cost accounting practice, other than a change under sub-division (a)(4)(i) or (a)(4)(iv) of this clause, negotiate an equitable adjustment as provided in the Changes clause of this contract.

(iv) Agree to an equitable adjustment as provided in the Changes clause of this contract, if the contract cost is materially affected by an accounting principle amendment required under the OMB Uniform Guidance at 2 CFR part 200, subpart E and appendix III, which, on becoming effective after the date of contract award, requires the Contractor to make a change to the Contractor’s established cost accounting practices.