49 CFR 383.123 - Requirements for a school bus endorsement.
(2) Knowledge test. Must have knowledge covering the following topics:
(i) Loading and unloading children, including the safe operation of stop signal devices, external mirror systems, flashing lights, and other warning and passenger safety devices required for school buses by State or Federal law or regulation.
(iii) State and Federal laws and regulations related to safely traversing railroad-highway grade crossings; and
(iv) Operating practices and procedures not otherwise specified.
(b) Exception. Knowledge and skills tests administered before September 30, 2002 and approved by FMCSA as meeting the requirements of this section, meet the requirements of paragraphs (a)(2) and (3) of this section