(f) Any school police officer first employed by a K–12 public school district or California Community College district after July 1, 1999, shall successfully complete a basic course of training as prescribed by subdivision (a) before exercising the powers of a peace officer. A school police officer shall not be subject to this subdivision while participating as a trainee in a supervised field training program approved by the Commission on Peace Officer Standard and Training. (g) The commission shall prepare a specialized course of instruction for the training of school peace officers, as defined in Section 830.32, to meet the unique safety needs of a school environment. This course is intended to supplement any other training requirements. (h) Any school peace officer first employed by a K–12 public school district or California Community College district before July 1, 1999, shall successfully complete the specialized course of training prescribed in subdivision (g) no later than July 1, 2002. Any school police officer first employed by a K–12 public school district or California Community College district after July 1, 1999, shall successfully complete the specialized course of training prescribed in subdivision (g) within two years of the date of first employment.