Be it enacted by the President, Council, and Assembly, That it shall and may be lawful to and for the Mayor, Aldermen and Commonalty of the said City of Saint John, in Common Council convened, and they are hereby authorised, and required, from time to time, as they shall find it necessary or expedient, to make any by-laws, rules and regulations, for preventing the unloading or throwing overboard of any ballast or rubbish, in any Roadstead, place of Anchorage, or Waters of the Bay of Fundy, contiguous or near to the Harbour of the said City, and without the limits of the said City, or for preventing such Roadsteads, places of Anchorage or Waters, being in any other manner encumbered or filled up, and to enforce the observance of such by-laws, rules or regulations, by pains, punishments, and penalties, in such and the like manner to all intents and purposes as the said Mayor, Aldermen, and Comonalty, may now do by virtue of the Charter of the said City, or otherwise by Law, with regard to the Harbour and Places within the limits of the said City.