Section 23(1)(a) in The Rajasthan Shops and Commercial Establishment Rules, 1959
(a)In every establishment, all the inside walls, of the rooms and all t he ceilings and lops of such rooms (whether such walls, ceilings and tops to be plastered or not) and all the passages and stair cases shall be lime washed or colour washed at least once in two years dating from time when they were last lime washed or colour washed, and shall be maintained in a clear State.