It shall not be lawful for any Person to fish for or take or aid or assist in fishing for or taking any Salmon in or from the River at any Time between the Fourteenth Day ofSeptemberin any Year and the Fifteenth Day ofFebruaryin the Year following, except by means of the Rod and Line with the artificial Fly only, nor with the Rod and Line at any Time between the Thirtieth Day ofNovemberin any Year and the First Day ofFebruaryin the Year following, and which respective Periods above defined shall be and be held to be the “Annual Close Times,” within the Meaning of the recited Act and this Act; provided that the Commissioners or any Five of their Number may, by Writing under their Hands or under the Hand of their Clerk, authorize any Persons appointed by them to fish for and take Salmon in or from the River, with the Consent of the Owner of the Fishery from which such Salmon are taken, during the Annual Close Times, for the Purpose of artificial Propagation.