The Revised Ordinances of the City of Portland, 1848 Page 22, Image 22 (1848) available at The Making of Modern Law: Primary Sources.

[Ordinances of the City of Portland,] Of Gunpowder, § 1. No person not licensed to keep and sell gunpowder shall keep or have in his shop, store, dwelling house or other tenement, at any one time, a larger quantity of gunpowder than one pound. § 2. No person licensed to keep and sell gunpowder shall have or keep in his store, shop, dwelling house or in any other tenement or place whatever at any one time, a larger quantity of gunpowder then twenty-five pounds. § 3. Every person licensed to keep and sell gunpowder shall provide himself with a strongly made copper chest or box with a copper cover well secured, with hinges and a lock of the same material, and the keg or canister in which said powder may be, shall be kept in said copper chest or box, which shall at all times be placed near the outer door of the building in which it is kept, in convenient place to remove in case of fire. § 4. No person shall haul unto, or lay at any wharf in the city, any vessel having on board a quantity of gunpowder exceeding twenty-five pounds, or receive gunpowder on board exceeding twenty-five pounds, without first having obtained a permit from the mayor and aldermen, and said permit shall designate the wharf at which said powder may be landed, or received on board.