Service Contract Act
Title 29, Code of Federal Regulations, Part 4
Labor Standards for Federal Service Contracts

(29CFR 4.78-4.179)

29 CFR 4.178 - Computation of hours worked.

Since employees subject to the Act are entitled to the minimum
compensation specified under its provisions for each hour worked in
performance of a covered contract, a computation of their hours worked
in each workweek when such work under the contract is performed is
essential. Determinations of hours worked will be made in accordance
with the principles applied under the Fair Labor Standards Act as set
forth in part 785 of this title which is incorporated herein by reference. In general, the hours worked by an employee include all periods in which the employee is suffered or permitted to work whether or not required to do so, and all time during which the employee is required to be on duty or to be on the employer's premises or to be at a prescribed workplace. The hours worked which are subject to the compensation provisions of the Act are those in which the employee is engaged in performing work on contracts subject to the Act.

However, unless such hours are adequately segregated, as indicated in Sec. 4.179, compensation in accordance with the Act will be required for all hours of work in any workweek in which the employee performs any work in
connection with the contract, in the absence of affirmative proof to the
contrary that such work did not continue throughout the workweek.

29 CFR 4.179 - Identification of contract work.

Contractors and subcontractors under contracts subject to the Act
are required to comply with its compensation requirements throughout the
period of performance on the contract and to do so with respect to all
employees who in any workweek are engaged in performing work on such
contracts. If such a contractor during any workweek is not exclusively
engaged in performing such contracts, or if while so engaged it has
employees who spend a portion but not all of their worktime in the
workweek in performing work on such contracts, it is necessary for the
contractor to identify accurately in its records, or by other means, those periods in each such workweek when the contractor and each such employee performed work on such contracts.

In cases where contractors are not exclusively engaged in Government contract work, and there are adequate records segregating the periods in which work was performed on contracts subject to the Act from periods in which other work was performed, the compensation specified under the Act need not be paid for hours spent on non-contract work. However, in the absence of records adequately segregating non-covered work from the work performed on or in connection with the contract, all employees working in the establishment or department where such covered work is performed shall be presumed to have worked on or in connection with the contract during the period of its performance, unless affirmative proof establishing the contrary is presented.

Similarly, in the absence of such records, an employee performing any
work on or in connection with the contract in a workweek shall be presumed to have continued to perform such work throughout the workweek, unless affirmative proof establishing the contrary is presented. Even where a contractor can segregate Government from non-Government work, it
is necessary that the contractor comply with the requirements of section
6(e) of the FLSA discussed in Sec. 4.160.