Section 12(1)(c) in The Maharashtra Beedi and Cigar Workers (Conditions of Employment) Rules, 1968
(c)all inside walls and partitions, all ceiling or top of the rooms and all walls, sides and staircases shall,-(i)where they have smooth impervious surface, be cleaned with fresh water and dried at least once every period of fourteen months;(ii)where they are painted or varnished, re-painted or re-varnished at least once in every period of five years;(iii)in any other case, be kept white-washed or colour-washed at least once in every period of five years.