62 Pa.C.S. § 541
(2) The proposed contractor's accounting system is adequate to allocate costs in accordance with generally accepted accounting principles.
Notwithstanding the preceding, a contract may be used without a prior written determination where the contract is a firm, fixed-price contract or a contract awarded under section 516 (relating to emergency procurement).
No contract type shall be used unless it has been determined in writing by the head of the purchasing agency that:
Cross References. Section 541 is referred to in sections 561, 9119 of this title.