§ 550.905 Payment of hazard pay differential

5 CFR 550.905(a)(a) When an employee performs duty for which a hazard pay differential is authorized, the agency must pay the hazard pay differential for the hours in a pay status on the day (a calendar day or a 24-hour period, when designated by the agency) on which the duty is performed, except as provided in paragraph (b) of this section. Hours in a pay status for work performed during a continuous period extending over 2 days must be considered to have been performed on the day on which the work began, and the allowable differential must be charged to that day.

5 CFR 550.905(b)(b) Employees may not be paid a hazardous duty differential for hours for which they receive annual premium pay for regularly scheduled standby duty under § 550.141, annual premium pay for administratively uncontrollable overtime work under § 550.151, or availability pay for criminal investigators under § 550.181.