This contract type shall not be used unless--
(a) The contract is for research and development and the estimated cost is $150,000 or less;
(b) The contractor's accounting system is adequate for price redetermination;
(c) There is reasonable assurance that the price redetermination will take place promptly at the specified time; and
(d) The head of the contracting activity (or a higher-level official, if required by agency procedures) approves its use in writing. [48 FR 42219, Sept. 19, 1983, as amended at 75 FR 53133, Aug. 30, 2010]