FAR 



222.103-4  Approvals.

(a)  The department/agency approving official shall-

(i)  Obtain the concurrence of other appropriate approving officials; and

(ii)  Seek agreement as to the contracts under which overtime premiums will be approved when-

(A)  Two or more contracting offices have current contracts at the same contractor facility; and

(B)  The approval of overtime by one contracting office will affect the performance or cost of contracts of another office. In the absence of evidence to the contrary, a contracting officer may rely on a contractor's statement that approval of overtime premium pay for one contract will not affect performance or payments under any other contract.