Section 10(1)(c) in The M.P. Beedi and Cigar Workers (Conditions of Employment) Rules, 1968
(c)all inside walls and partitions, ceilings of rooms and of walls, sides and staircases shall-(i)where they are painted or varnished or where they have smooth impervious surface, be cleaned with fresh water and dried at least once in every period of fourteen months;(ii)where they are painted or varnished, painted or revarnished 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 twelve months.