71 Pa. Stat. § 1804
First. It is declared that the river Delaware, from the Station Point, or northwest corner of New Jersey, northerly, to the place upon the said river where the circular boundary of the state of Delaware toucheth upon the same, in the whole length and breadth thereof, is and shall continue to be and remain a common highway, equally free and open for the use, benefit and advantage of the said contracting parties: Provided nevertheless, That each of the legislatures of the said state shall hold and exercise the right of regulating and guarding the fisheries on the said river Delaware, annexed to their respective shores, in such manner, that the said fisheries may not be unnecessarily interrupted during the season for catching shad, by vessels riding at anchor on the fishing ground, or by persons fishing under claim of a common right on said river.
71 P.S. § 1804