Contract AT(29-2)-1073 In order to carry out the apportionment described in a. above, Holmes & Narver, Inc. will be authorized by ALO and PMR provisionally to bill the Navy under Contract N123(67156) 23306A(PMR) and the advanced fund account of the AEC under Contract AT(29-2)-20, as appropriate percentage of the respective total adjusted direct allowable or reimbursable costs incurred under each of the contracts for the billing period involved, - The percentage authorized by ALO and PMR will be revised, if necessary, from time to time so as to keep the return to Holmes & Narver from such provisional billings in balance with the indirect costs incurred in the Special Facilities Division. In any event, the amounts provisionally billed during any fiscal year of the United States Government (or such shorter appropriate period as shall be agreed to by ALO and PMR)shall be adjusted to conform:to actually incurred and audited allowable indirect costs and to the apportionment formula set forth in a, above. Notwithstanding the provisions of a.. above, the final apportionment of allowable indirect costs of the Special Facilities Division shall be subject at any time to both retrospective and prospective adjustment to assure an equitable apportionment of costs between the AEC and the Navy. =3~ Such adjustment may be