; (C) not approve any individual as a delegated FAA representative for a function unless the individual meets the prerequisites established by the Administrator for that function; (D) provide specific training to the individuals approved to serve as a delegated representative of the FAA in a specific field or skill code that explains the individual’s role and responsibility and limits of authority when acting as a delegated FAA representative; (E) be the final authority for any type certificate issuance; and (F) not delegate final authority for any type certificate issuance. . (c) Cost recovery matrix (1) In general Not later than 180 days after the date of enactment of this Act, the Secretary of Transportation shall study, develop, and submit to the Committee on Commerce, Science, and Transportation of the Senate and the Committee on Transportation and Infrastructure of the House of Representatives a proposed cost recovery matrix that may be applied to any company or organization seeking product type certification from the Administrator. (2) Public comment period required Before developing the proposed cost recovery matrix required under paragraph (1), the Secretary of Transportation shall provide a 90-day period for public comment on the proposed development of such a matrix. 8. Preserving FAA control of delegation oversight authority Section 44736(a) of title 49, United States Code, is amended— (1) in paragraph (1)— (A) by striking subparagraph (B) and inserting the following: (B) delegate to the ODA holder the functions to be performed as specified in the procedures manual, unless the Administrator determines that the public interest and safety of air commerce requires a limitation with respect to 1 or more of the functions; and ; (B) in subparagraph (C), by striking ; and and inserting a period; and (C) by striking subparagraph (D)