The owner and operator shall permanently mark all fill ports to identify product inside the underground storage tank system. The markings shall be consistent with the colors and symbol codes established by the American Petroleum Institute Publication #1637, "Using the API Color-Symbol System to Mark Equipment and Vehicles for Product Identification at Service Station and Distribution Terminals," and the American Petroleum Institute Publication #1542, "Airport Equipment Marking for Fuel Identification," incorporated herein by reference, as amended and supplemented.
N.J. Admin. Code § 7:14B-5.8