N.Y. Const. art. XV, § 1

The legislature shall not sell, abandon or otherwise dispose of the now existing or future improved barge canal, the divisions of which are the Erie canal, the Oswego canal, the Champlain canal, and the Cayuga and Seneca canals, or of the terminals constructed as part of the barge canal system; nor shall it sell, abandon or otherwise dispose of any portion of the canal system existing prior to the barge canal improvement which portion forms a part of, or functions as a part of, the present barge canal system; but such canals and terminals shall remain the property of the state and under its management and control forever. This prohibition shall not prevent the legislature, by appropriate laws, from authorizing the granting of revocable permits or leases for periods of time as authorized by the legislature for the occupancy or use of such lands or structures.