N.Y. Comp. Codes R. & Regs. tit. 16, § 13.8
(7) Unless a customer does not have access to the meter or the customer will be unable to obtain a reliable meter reading, the utility shall, at the time of any unsuccessful reading attempt, leave at the premises or mail to the customer a meter-reading card for the nondemand meter.
(b) Estimated bills.
(1) A utility may render an estimated bill for a regular cycle billing period only when:
(2) Every estimated bill shall be calculated in accordance with an established formula or methodology which shall take into account the best available relevant factors for determining the customer's energy usage and, if applicable, demand usage.
(c) No-access procedure.
(1) A utility shall begin providing no-access notices as described in this subdivision, commencing with:
(3) The series of no-access notices shall be as follows:
(a) Meter reading.