Section 71(9)(a) in The Punjab Factory Rules, 1952
(a)In every canteen -(i)all inside walls of rooms and all ceilings and passages and staircases shall be limewashed atleast once in each year or painted once in three years dating from the period when last limewashed, or painted, as the case may be;(ii)all woodwork shall be varnished or painted once in three years dating from the period when last varnished or painted;(iii)all internal structural iron and steel work be painted once in three years dating from the period when last painted: