Overtime means the time worked in excess of the scheduled workday or scheduled workweek or during any of the UN official holidays. 2. The following is not considered as overtime: a) Time spent travelling to and from the place of work; b) Work performed during the lunch period; c) Work performed outside regular working hours due to the adoption of a shift system except when the total time worked exceeds the scheduled workday or workweek. Overtime compensation (OC) is payable to General Service (GS) staff members, with Permanent, Continuing or Fixed-Term appointments governed by the UN Staff Regulations and Staff Rules. OC is neither payable to National Professional Officers (NPOs) nor to International Professional staff members.