Section 227.3 - Application(a) Except as provided in paragraph (b) of this section, subpart B of this part applies to all railroads and contractors to railroads.(b) Subpart B of this part does not apply to-(1) A railroad that operates only on track inside an installation that is not part of the general railroad system of transportation;(2) A rapid transit operation in an urban area that is not connected to the general railroad system of transportation;(3) A rapid transit operation in an urban area that is connected to the general system and operates under a shared use waiver;(4) A railroad that operates tourist, scenic, historic, or excursion operations, whether on or off the general railroad system of transportation; or(5) Foreign railroad operations that meet the following conditions: Employees of the foreign railroad have a primary reporting point outside of the U.S. but are operating trains or conducting switching operations in the U.S.; and the government of that foreign railroad has implemented requirements for hearing conservation for railroad employees; the foreign railroad undertakes to comply with those requirements while operating within the U.S.; and FRA's Associate Administrator for Railroad Safety/Chief Safety Officer determines that the foreign requirements are consistent with the purpose and scope of subpart B of this part. A "foreign railroad" refers to a railroad that is incorporated in a place outside the U.S. and is operated out of a foreign country but operates for some distance in the U.S.(c) Except as provided in paragraph (d) of this section, subpart C of this part applies to any railroad that operates a freight train that transports a PIH material, including a residue of such a PIH material, on standard gage track that is part of the general railroad system of transportation.(d) Subpart C of this part does not apply to a railroad that operates only on track inside an installation that is not part of the general railroad system of transportation.71 FR 63123, Oct. 27, 2006, as amended at 89 FR 5131, Jan. 26, 2024