to relevant subject matters. (4) Leadership training Not later than one year after the date of the enactment of this subsection, the Commissioner shall develop and require training courses geared towards the development of leadership skills for mid- and senior-level career employees not later than one year after such employees assume duties in supervisory roles. . (b) Report Not later than 180 days after the date of the enactment of this Act, the Commissioner shall submit to the Committee on Homeland Security and the Committee on Ways and Means of the House of Representatives and the Committee on Homeland Security and Governmental Affairs and the Committee on Finance of the Senate a report identifying the guidelines and curriculum established to carry out subsection (l) of section 411 of the Homeland Security Act of 2002, as amended by subsection (a) of this section. (c) Assessment Not later than four years after the date of the enactment of this Act, the Comptroller General of the United States shall submit to the Committee on Homeland Security and the Committee on Ways and Means of the House of Representatives and the Committee on Homeland Security and Governmental Affairs and the Committee on Finance of the Senate a report that assesses the training and education, including continuing education, required under subsection (l) of section 411 of the Homeland Security Act of 2002, as amended by subsection (a) of this section. 1145. Establishment of workload staffing models for U.S. Border Patrol and Air and Marine Operations of CBP (a) In general Not later than one year after the date of the enactment of this Act, the Commissioner, in coordination with the Under Secretary for Management, the Chief Human Capital Officer, and the Chief Financial Officer of the Department, shall implement a workload staffing model for each of the following: (1) The U.S. Border Patrol. (2) Air and Marine Operations of CBP. (b) Responsibilities of the Commissioner of CBP Subsection (c) of section 411 of the Homeland Security Act of