6 U.S. Code § 1131 - Definitions
The term “appropriate congressional committees” means the Committee on Banking, Housing, and Urban Affairs, and the Committee on Homeland Security and Governmental Affairs of the Senate and the Committee on Homeland Security and the Committee on Transportation and Infrastructure of the House of Representatives.
The term “frontline employee” means an employee of a public transportation agency who is a transit vehicle driver or operator, dispatcher, maintenance and maintenance support employee, station attendant, customer service employee, security employee, or transit police, or any other employee who has direct contact with riders on a regular basis, and any other employee of a public transportation agency that the Secretary determines should receive security training under section 1137 of this title.
 So in original. Probably should be “part”.