; (2) identifies the aircraft and engines that are eligible to use the qualified replacement unleaded gasoline; and (3) adopts a process (other than the traditional means of certification) to allow eligible aircraft and engines to operate using qualified replacement unleaded gasoline in a manner that ensures safety. (b) Timing The Administrator shall adopt the process described in subsection (a)(3) not later than 180 days after the later of— (1) the date on which the Administration completes the Piston Aviation Fuels Initiative; or (2) the date on which the American Society for Testing and Materials publishes a production specification for an unleaded aviation gasoline. 2404. Applicability of medical certification standards to operators of air balloons (a) Short title This section may be cited as the Commercial Balloon Pilot Safety Act of 2017 . (b) In general Not later than 180 days after the date of enactment of this Act, the Administrator of the Federal Aviation Administration shall revise section 61.3(c) of title 14, Code of Federal Regulations (relating to second-class medical certificates), to apply to an operator of an air balloon to the same extent such regulations apply to a pilot flight crewmember of other aircraft. (c) Air balloon defined In this section, the term air balloon has the meaning given the term balloon in section 1.1 of title 14, Code of Federal Regulations (or any corresponding similar regulation or ruling). 2405. Technical corrections Section 2110 of the FAA Extension Safety and Security Act of 2016 ( Public Law 114–190