N.Y. Comp. Codes R. & Regs. Tit. 16 §§ 720-3.5
Except as provided under section 720-1.4 of this Part, or where service is provided pursuant to contractual or arrangements between the customer and the utility (i.e., a flex rate contract) as may be authorized by the commission, where a public utility requires an applicant to make written application for service, each form of contract or agreement shall provide for service under the regularly filed rates, charges, or rentals and shall be shown either as a part of each service classification or rate table to which it is applicable or under general information, with an appropriate reference in each service classification or rate table to which it is applicable. Each form shall show either therein or by reference to the schedule, the nature and extent of the service to be rendered, the rates and charges to be made, all rules and regulations applicable, and all privileges and facilities granted or allowed.
N.Y. Comp. Codes R. & Regs. Tit. 16 §§ 720-3.5