Section 17(8)(a) in The Bihar Motor Transport Workers Rules, 1962
(a)in every canteen-(i)all inside walls of rooms and all ceilings, passages and staircases shall be lime-washed, colour-washed or painted as the case may be. Lime-washing or colour washing shall be carried out once in every year and painting shall be carried out once in every three years;(ii)all wood work shall be varnished or painted once in every three years; and(iii)all internal structural iron or steel work shall be varnished or painted once in every three years: