; (2) streamlined protocols for operators and air carriers operating aircraft under part 135 to add an aircraft that was listed on another part 135 certificate immediately prior to moving to a new air carrier or operator; and (3) changes to FAA policy and documentation necessary to implement the recommendations of the Working Group. (d) Congressional briefing Not later than 1 year after the date on which the Administrator establishes the Working Group, the Administrator shall brief the appropriate committees of Congress on the progress made by the Working Group in carrying out the duties specified in subsection (c), recommendations of the Working Group, and the efforts of the Administrator to implement such recommendations. (e) Definition of part 135 In this section, the term part 135 means part 135 of title 14, Code of Federal Regulations. 820. Flight instructor certificates Not later than 18 months after the date of enactment of this Act, the Administrator shall issue a final rule for the rulemaking activity titled Removal of the Expiration Date on a Flight Instructor Certificate , published in Fall 2022 in the Unified Agenda of Federal Regulatory and Deregulatory Actions (RIN 2120–AL25) to, at a minimum, update part 61 of title 14, Code of Federal Regulations, to— (1) remove the expiration date on a flight instructor certificate; and (2) replace the requirement that a flight instructor renews their flight instructor certificate with appropriate recent experience requirements for the holder of a flight instructor certificate to exercise the privileges of such certificate. 821. Consistency of policy application in flight standards and aircraft certification (a) In general The inspector general of the Department of Transportation shall initiate audits, as described in subsection (d), of the Flight Standards and Aircraft Certification Services of the FAA, and the personnel of such offices, on the consistency of— (1) the interpretation of policies, orders, guidance, and regulations