Section 146 in Delhi Prisons (Inspection, Meetings and Duties of Officers) Rules, 1988
146. Matters concerning the wearing of uniform, cleanliness required.
(1)Every subordinate officer in respect of the office held by him, shall wear uniform at all times when on duty, within jail premises or in any public place, may, either uniform or private clothes at any time, be worn by any subordinate officer.(2)Every subordinate officer shall at all times and on all occasions be clean and neat as to his dress, and clean as to his person.
