New york constitution
Article XVIII: housing
Section 10

The legislature is empowered to make all laws which it shall deem necessary and proper for carrying into execution the foregoing powers. This article shall be construed as extending powers which otherwise might be limited by other articles of this constitution and shall not be construed as imposing additional limitations; but nothing in this article contained shall be deemed to authorize or empower the state, or any city, town, village or public corporation to engage in any private business or enterprise other than the building and operation of low rent dwelling houses for persons of low income as defined by law, or the loaning of money to owners of existing multiple dwellings as herein provided.