(a)In every canteen-(i)All inside walls of rooms and ceilings and passage and stair-cases shall be limewashed or colour washed at least once in each year or painted once in three years dating from the period when last lime-washed, or painted as the case may be;(ii)All wood work shall be varnished or painted once in three years dating from the period when last varnished or painted;(iii)All internal structural iron or steel work shall be vanished or painted once in three years dating from the period when last vanished or painted: