(a) The Principal Director, Defense Pricing, Contracting, and Acquisition Policy, Office of the Under Secretary of Defense (Acquisition and Sustainment), may exempt the contracts in FAR 32.611(a)(2) through (5) and other contracts, in exceptional circumstances, from the administrative interest charges required by this subpart.

(7) Other exceptions are—

(A) Contracts for instructions of military or ROTC personnel at civilian schools, colleges, and universities;

(B) Basic agreements with telephone companies for communications services and facilities, and purchases under such agreements; and

(C) Transportation contracts with common carriers for common carrier services.