24. The occupier of any premises or part of any premises used for the manufacture or sale of any article of food shall ensure- (1) that no sanitary convenience, dustbin or ashpit is contained in, or communicates directly with, or is so placed that offensive odour therefrom penetrates into, such premises or part of such premises; (2) that no source of, or receptacle for, the supply of water to such premises or part of such premises communicates directly with a drain, sink or sanitary convenience, or discharges directly into a sanitary convenience, and that there is not in such premises or part of such premises any outlet for the ventilation of any drain or for conveying sewage or foul water into any drain; (3) that the roof, ceiling, walls, windows, doors and floor of such premises or part of such premises are kept clean and in good repair; (4) that such premises or part of such premises are not used for sleeping purposes; (5) that such premises or part of such premises are provided with sufficient and suitable ventilation;(6) that no refuse or filth, whether solid or liquid, is permitted to accumulate anywhere in such premises or part of such premises; (7) that no waste-matter resulting from any process of manufacture or sale of any article of food is permitted to accumulate in any premises or part of any premises in which such manufacture or sale is carried on except in so far as is unavoidable in the nature of such manufacture or sale; and (8) that all articles used in such premises or part of such premises are kept clean, and that all persons employed therein keep themselves and their clothing as clean as may be consistent with the nature of their employment.