N.Y.C. Admin. Code § 22-304: § 22-304 Rates.

The fixing of rates for furnishing hydroelectric and other forms of energy to residential, commercial, industrial and other customers shall include consideration of (1) the actual cost to the city for the purchase, distribution and delivery of such energy to such customers, (2) the actual expenses necessary for administration of the public utility service, including expenses for research and development, and (3) any other costs or charges allowed under law, including but not limited to, losses of tax revenues resulting from the operation of the public utility service. Such rates shall be computed to provide revenue in an amount not less than that necessary to recover fully such costs and expenses. Such rates shall be subject to approval of the city council.