N.Y. Agric. & Mkts. Law § 188

§ 188. Service charge based on quantity. No person shall impose a\nservice charge which is based upon quantity in excess of the actual\nquantity of any commodity or article serviced. Nothing in this\nprovision, however, shall prohibit the person or persons rendering the\nservice from establishing a minimum charge therefor; such minimum charge\nto apply to all quantities up to and including a fixed limit regardless\nof the actual weight or measure of the commodity involved. In the event\nof the establishment of a minimum charge, the dispenser of the service\nshall inform the person receiving the service, by advertisement or\notherwise, of the terms of such minimum charge.\n