N.Y.C. Admin. Code § 20-751: § 20-751 Disclosure of base prices.

(a) Where the price of the service is calculated on a base fee plus labor and parts as determined by time and cost of materials, the base fee and the cost of labor per common unit of time shall be listed, and the list shall state that the cost of parts will be additional. The list shall also state that warranty information is available on request.

(b) Where the cost of service includes the cost of parts, the service establishment shall provide a list of parts actually provided and the cost of each.