That portion of the East River, in New York County, State of New York, lying between the south line of East Seventeenth Street, extended eastwardly, the United States pierhead line as it existed on , and the south line of East Thirtieth Street, extended eastwardly, is hereby declared to be not a navigable water of the United States within the meaning of the Constitution and the laws of the United States.July 1, 19651965-07-01