(a) Except as provided in paragraph (b) of this section, this part includes requirements for the following persons. Specific sections in this part provide detailed requirements.(1) Each passenger railroad carrier.(2) Each public transportation agency.(3) Each operator of a rail transit system that is not operating on track that is part of the general railroad system of transportation, including heavy rail transit, light rail transit, automated guideway, cable car, inclined plane, funicular, and monorail systems.(4) Each tourist, scenic, historic, and excursion rail owner/operator, whether operating on or off the general railroad system of transportation.(b) This part does not apply to a ferry system required to conduct training pursuant to 46 U.S.C. 70103 .