N.Y. Comp. Codes R. & Regs. tit. 21 § 454.10
No voluntary transfer of service by customer or of the rights of customer under its accepted application for electric service or other contract document shall be made without the written approval of authority, provided, that any successor to or assignee of the rights of the customer, whether by voluntary transfer, judicial sale, foreclosure sale, or otherwise, shall be subject to all the provisions and conditions of this Part, the applicable service tariff or other contractual arrangements between customer and authority to the same extent as though such successor or assignee were the original customer, and provided further, that the execution of a mortgage or trust deed, or judicial or foreclosure sales made thereunder, shall not be deemed voluntary transfer within the meaning of this section.
N.Y. Comp. Codes R. & Regs. Tit. 21 § 454.10