Section 2(1)(o) in Unique Identification Authority of India (Salary, Allowances and other Terms and Conditions of Service of Employees) Regulations, 2020
(o)"service" includes the period during which an employee is on duty as well as on leave duly authorised by the Competent Authority, but does not include any period during which an employee is absent from duty without permission or overstays his leave, unless specifically permitted by the Competent Authority, and