29 C.F.R. § 9.12
(a) General.
(b) Method of job offer.
(c) Exceptions. The successor contractor will bear the responsibility of demonstrating the appropriateness of claiming any of the following exceptions to the nondisplacement provisions subject to this part.
(1) Nondisplaced employees.
(3) Predecessor contractor's non-service employees.
(4) Employee's past unsuitable performance.
(ii)
(5) Non-Federal work.
(d) Reduced staffing.
(1) Contractor determines how many employees.
(ii) Where, in accordance with this authority to employ fewer employees, a successor contractor does not offer employment to all the predecessor contract employees, the obligation to offer employment shall continue for 90 days after the successor contractor's first date of performance on the contract. The contractor's obligation under this part will end when all of the predecessor contract employees have received a bona fide job offer, including stating the time within which the employee must accept such offer, which must be no less than 10 days, or the 90-day window of obligation has expired. The following three examples demonstrate the principle.
(e) Contractor obligations near end of contract performance.
(f) Recordkeeping.
(2) Records to be retained.
(iv) Every contractor who makes retroactive payment of wages or compensation under the supervision of the Administrator of the Wage and Hour Division pursuant to § 9.24(b) of this part, shall:
(B) Prepare a report of each such payment on a receipt form provided by or authorized by the Wage and Hour Division, and
(1) Preserve a copy as part of the records,
(2) Deliver a copy to the employee, and
(3) File the original, as evidence of payment by the contractor and receipt by the employee, with the Administrator or an authorized representative within 10 days after payment is made.