; (2) utilization of the Administrator's direct-hire authorities with respect to the Unmanned Aircraft System Collegiate Training Initiative of the FAA; and (3) number of employees hired as a result of the utilization of such authorities by the Administrator, the relevant lines of business or offices in which such employees were hired, and the occupational series of the positions filled. 429. FAA Workforce review audit (a) In general Not later than 90 days after the date of enactment of this Act, the inspector general of the Department of Transportation shall initiate an audit of any FAA workforce plans completed during the 5 fiscal years preceding the fiscal year in which such audit is initiated related to occupations the agency relies on to accomplish its aviation safety mission. (b) Contents In conducting the audit under subsection (a), the inspector general shall— (1) identify whether any safety-critical positions have not been reviewed within the period specified in subsection (a); (2) assess staffing levels and workforce retention trends relating to safety-critical occupations within all offices of the FAA that support such services; (3) review FAA workforce gaps in safety-critical and senior positions, including the average vacancy period of such positions during the most recent fiscal year in the period specified in subsection (a); (4) evaluate any applicable assessments of the historic workload of safety-critical positions and changes in workload demands over time; (5) analyze any applicable assessments of critical competencies and skills gaps among safety-critical positions conducted by the FAA and any relevant agency actions in response; (6) review whether existing FAA workforce development programs are producing intended results, especially in rural communities, such as increased recruitment and retention of agency personnel