29 C.F.R. § 783.44
The wages for the period covered by the wage payment include all remuneration for employment paid to or on behalf of the employee for all hours actually on duty intended to be compensated by such wage payment. The reasonable cost or fair value, as determined by the Secretary of Labor pursuant to section 3(m) of the Act, of board and lodging furnished the employee during such period, if customarily furnished by the employer to his employees, is also included as part of the wages for the actual hours worked in the period (see § 783.16 ). However, the cost of board and lodging would not be included as part of the wages paid to the employee to the extent it is excluded from the employee's wages under terms of a bona fide collective bargaining agreement applicable to such employee, whether or not customarily furnished to the employee. Where such an exclusion is not provided for in any bona fide collective bargaining agreement applicable to the employee, the reasonable cost or fair value thereof, whichever is appropriate, as determined in accordance with the standards set forth in the regulations in part 531 of this chapter, is included as part of the wage paid to such employee. Part 531 of this chapter also contains the official regulations and interpretations of the Department of Labor concerning the application of section 3(m) to other facilities as well as board and lodging furnished to an employee.
29 C.F.R. §783.44