48 CFR §22.406-4

1. (a)The contracting officer shall review the contractor's employment and payment records of apprentices and trainees made available pursuant to the clause at 52.222-8, Payrolls and Basic Records, to ensure that the contractor has complied with the clause at 52.222-9, Apprentices and Trainees.
2. (b)If a contractor has classified employees as apprentices or trainees without complying with the requirements of the clause at 52.222-9, the contracting officer shall reject the classification and require the contractor to pay the affected employees at the rates applicable to the classification of the work actually performed.