This Handbook supplements Office of Personnel Management (OPM) guidance for the administration of premium pay for General Schedule (GS), Federal Wage System (FWS) employees, and United States citizens in technical and support positions (pay plan designations FO and FP) paid under the Foreign Service Schedule.
Throughout the Handbook the term GS is used to include GM, GG, GH, and FC employees and employees under pay demonstration projects who are comparable. ES includes FE.
