New York Codes, Rules and Regulations
Title 21 - Miscellaneous
Chapter XXIV - The Port Authority Of New York And New Jersey
Subchapter D - Air Terminals
Article 2 - Teterboro Airport
Part 1273 - Fuel Handling
Section 1273.7 - Presence of passengers, unauthorized persons and smoking prohibited during fuel handling

During fuel handling in connection with any aircraft, no passenger or passengers shall be permitted to remain in such aircraft unless a cabin attendant is at the door and a passenger ramp is in position if the same is required for the safe and rapid debarkation of passengers. Smoking is prohibited in or about such aircraft during fuel handling. Only personnel engaged in the fuel handling, or in the maintenance and operation of the aircraft being fueled shall be permitted within 50 feet of the fuel tanks of such aircraft during the fuel handling operations.