VIII. And be it further enacted, That in any parish or parishes in any city or town where any such officers of health shall be appointed as aforesaid, and where no power or authority is or shall be vested in or given to Magistrates or Corporation of such city or town, to regulate the sweeping and cleansing of the streets therein, and the collecting and disposing of the dirt, dung, and filth of the said streets, and also in any city or town whatever, where the scavengers or other persons who shall be entrusted with or contract for the cleansing and sweeping of the streets, under the direction of the Magistrates or Corporation or not, shall neglect or omit to cleanse and sweep the streets and lanes of such city or town, twice at least in every week, it shall and may be lawful for such officers of health to cause and direct such streets to be swept and cleansed, and the dirt, dung, and filth collected from the same to be sold and disposed of, and the produce thereof to be applied for the purposes of this Act, and in diminution of the charge on the parish for which such officers shall be appointed: provided always, that in all cases where the Magistrates or Corporation of any city or town have or shall have power and authority to regulate the sweeping or cleansing of the streets, or where any scavenger or other person shall be appointed or shall have contracted for that purpose, the said officers of health shall give twenty-four hours notice to the chief magistrate of such city or town, and to the scavenger or other person contracting for the cleansing of such streets, of the neglect or omission to sweep and cleanse the same; and that at the expiration of such twenty-four hours, in case the said streets shall not be duly swept and cleansed, it shall be lawful for the said officers of health to cause the same to be swept and cleansed, and the produce thereof to be disposed of as aforesaid, any act, charter, law, usage or custom to the contrary notwithstanding.