(a) Individual or class determinations and decisions authorized

Determinations and decisions required to be made under this subchapter by the head of an executive agency may be made for an individual purchase or contract or, except to the extent expressly prohibited by another provision of law, for a class of purchases or contracts. Such determinations and decisions are final.

(b) Written findings required

(1)

Each determination under section 255(d) of this title or section 254d(c)(2)(B) of this title shall be based on a written finding by the person making the determination or decision. The finding shall set out facts and circumstances that support the determination or decision.

(2)

Each finding referred to in paragraph (1) is final.

(3)

The head of an executive agency shall maintain for a period of not less than 6 years a copy of each finding referred to in paragraph (1) that is made by a person in that executive agency. The period begins on the date of the determination or decision to which the finding relates