N.Y. Transp. Corp. Law § 15
If any person supplied with gas or electric light by any such corporation, except residential customers supplied pursuant to article two of the public service law shall neglect or refuse to pay the rent or remuneration due for the same or for the wires, pipes or fittings let by the corporation, for supplying or using such gas or electric light or for ascertaining the quantity consumed or used as required by his contract with the corporation, or shall refuse or neglect, after being required so to do, to make the deposit required, such corporation may discontinue the supply of gas or electric light to the premises of such person; and the officers, agents or workmen of such corporation may enter into or upon such premises between the hours of eight o'clock in the forenoon and six o'clock in the afternoon, and separate and carry away any meter, pipe, fittings, wires or other property of such corporation, and may disconnect any meter, pipe, fittings, wires or other works whether the property of the corporation or not, from the mains, pipes or wires of the corporation. But the supply of gas or electric light shall not be discontinued for non-payment of bills rendered for service until and after a five-day written notice has been served upon such person either by delivering the same to such person personally or by mailing the same in post-paid wrapper addressed to such person at premises where service is rendered.
N.Y. Transp. Corp. Law § 15