Where the initial legal regulated rent for a housing accommodation includes payments reserved in the lease or other rental agreement under a tax escalation clause, whenever there is a reduction in the amounts of increases in the real property taxes which were previously in effect, the initial legal regulated rent shall be subject to redetermination to exclude such payments or such part thereof as is warranted, as provided for in sections 2503.9 and 2503.10 of this Chapter.
N.Y. Comp. Codes R. & Regs. Tit. 9 § 2501.3