; (B) representatives of air carriers operating under part 135 of title 14, Code of Federal Regulations; and (C) industry associations representing such air carriers. (2) Existing working group The Administrator may assign the duties described in subsection (c) to an existing FAA working group if— (A) such working group includes representatives from the list of required members under paragraph (1); or (B) the membership of such existing working group can be modified to include representatives from the list of required members under paragraph (1). (c) Duties A working group shall review, evaluate, and make recommendations on the following: (1) Methods by which authorized check airmen for air carriers operating under part 135 of title 14, Code of Federal Regulations, are selected, trained, and approved by the Administrator. (2) Staffing and utilization rates of authorized check airmen by such air carriers. (3) Differences in qualification standards applied to— (A) employees of the FAA who serve as check airmen