in aviation safety (in this section referred to as the Task Force ). (b) Composition The Task Force shall consist of members appointed by the Administrator and having expertise in an operational or academic discipline that is relevant to the analysis of human errors in aviation. The number of members shall be determined by the Administrator to ensure sufficient representation of relevant operational and academic disciplines. (c) Duration (1) In general Members of the Task Force shall be appointed for the length of the existence of the Task Force. (2) Length of existence (A) In general The Task Force shall have an initial length of existence of 2 years. (B) Option The Administrator may exercise an option to lengthen the duration of the existence of the Task Force for a period of 2 years. (d) Disciplines For purposes of subsection (b), disciplines may include air carrier operations, line pilot expertise, air traffic control, technical operations, aeronautical information, aircraft maintenance and mechanics psychology, linguistics, human-machine integration, general aviation operations, and organizational behavior and culture. (e) Expertise (1) In general No less than half of the members shall have expertise in aviation. (2) Additional expertise The Task Force shall include members with expertise on human factors but whose experience and training are not in aviation specifically and who have not previously been engaged in work related to the Federal Aviation Administration or the aviation industry. The Task Force shall also include pilot labor organizations, certificated mechanic labor organizations, and the exclusive bargaining representative of the air traffic controllers certified under section 7111 of title 5, United States Code. (f) Federal Aviation Administration members (1) In general Not more than 4 members may be employees of the Federal Aviation Administration and National Transportation Safety Board, excluding representatives of the labor representatives of employees of the air traffic control system.