N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 14-11.2
Specifications are given in Section II of the ASME Boiler and Pressure Vessel Code for the important materials used in the construction of boilers, and the materials for miniature boilers, for which specifications exist, shall conform thereto, except that steel pipe for sizes over three inches in diameter shall be of open hearth steel. Owing to the small size of the parts of miniature boilers, stamping as required by Section II of the ASME Boiler and Pressure Vessel Code need not be visible after completing the boiler, provided the manufacturer certifies on the data report accompanying the boiler that the material is in accordance with the requirements of the New York State Miniature Boiler Code. Provisions shall be made by the manufacturer whereby it shall be able to supply complete information regarding the material and details of construction of any boiler built under the rules of this Part.
N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 14-11.2