A licensee shall —
(a) at the close of every day cause all fat, tallow, grease, refuse or filth which has been spilled or splashed or has fallen or been deposited on any floor, pavement or wall of the premises where offensive or hazardous trade is carried on —
(i) to be collected from the floor, pavement or wall of the premises by scraping or some other effectual method of cleansing; and
(ii) unless it is intended to be subjected to further offensive or hazardous trade processes on the premises, to be immediately removed from the premises; and
(b) keep all apparatus used in its offensive or hazardous trade in a clean condition at all times.