135.73 Refuelling and defuelling operations

• (a) Despite the requirements of rule 91.15(3), a person operating an aircraft under the authority of an air operator certificate issued in accordance with Part 119 may refuel or defuel the aircraft with a Class 3.1C or a Class 3.1D flammable liquid when a person is embarking, on board, or disembarking the aircraft, if the person operating the aircraft ensures that safety and aircraft evacuation precautions are taken in accordance with procedures specified in the certificate holder's exposition.
• (b) A person operating an aircraft under the authority of an air operator certificate issued in accordance with Part 119 may refuel or defuel the aircraft with a Class 3.1C or a Class 3.1D flammable liquid with one or more propulsion engines running if--
  • (1) the person ensures that safety and aircraft evacuation precautions are taken in accordance with procedures specified in the certificate holder's exposition; and
  • (2) the pilot-in-command is responsible for every aspect of the fuelling operation.