New York Codes, Rules and Regulations
Title 3 - BANKING
Chapter I - GENERAL REGULATIONS OF THE SUPERINTENDENT
Part 92 - Variable Rate Closed-end Retail Instalment Contracts And Obligations Entered Into By Retail Sellers
Section 92.7 - Grouping of contracts or obligations

If a retail seller or a holder adjusts the rate charged on contracts or obligations on common adjustment dates (such as the first day of January, April, July or October, or less frequently) rather than adjusting the rate of the credit service charge on an individual quarterly (or less frequent) interval measured from the date of the contract or obligation, the retail seller or the holder may on any common adjustment date increase the rate for a contract or obligation entered into within 25 days before that common adjustment date only if prior to the consummation of the contract or obligation the retail seller provides notice of the increase and of the new rate to the buyer.