5 U.S.C. § 5544: Wage-board overtime, Sunday rates, and other premium pay

If the basic rate of pay of the employee is fixed on a basis other than an annual or monthly basis, multiply the basic hourly rate of pay by not less than one and one-half. If the basic rate of pay of the employee is fixed on an annual basis, divide the basic annual rate of pay by 2,087, and multiply the quotient by one and one-half. If the basic rate of pay of the employee is fixed on a monthly basis, multiply the basic monthly rate of pay by 12 to derive a basic annual rate of pay, divide the basic annual rate of pay by 2,087, and multiply the quotient by one and one-half. An employee under the Office of the Architect of the Capitol who is paid on a daily or hourly basis and who is not subject to chapter 51 and subchapter III of chapter 53 of this title is entitled to overtime pay for overtime work in accordance with subsection (a) of this section. The overtime hourly rate of pay is computed in accordance with subsection (a)(1) of this section. The provisions of this section, including the last two sentences of subsection (a) and the provisions of section 5543(b), shall apply to a prevailing rate employee described in section 5342(a)(2)(B). is employed by the Forest Service or the Department of the Interior; and is a wildland firefighter, as defined in section 5332a(a); or is certified by the applicable agency to perform wildland fire incident-related duties during the period the employee is deployed to respond to a qualifying incident (as defined in section 5545c(a)).