49 C.F.R. § 1109.5
(a) In addition to the mediation procedures under this part that are available following the filing of a complaint in a proceeding before the Board, Amtrak or a State member of the State Supported Route Committee established under 49 U.S.C. 24712 may request that the Board informally assist in securing outside professional mediation services in order to resolve disputes arising from: Implementation of, or compliance with, the cost allocation methodology for State-Supported Routes developed under section 209 of the Passenger Rail Investment and Improvement Act of 2008 or amended under 49 U.S.C. 24712(a)(6); invoices or reports provided under 49 U.S.C. 24712(b); or rules and procedures implemented by the State Supported Route Committee under 49 U.S.C. 24712(a)(4). With respect to a particular dispute, such a request for informal assistance in securing outside professional mediation services may be submitted to the Board:
(b) In addition to the mediation procedures under this part that are available following the filing of a complaint in a proceeding before the Board, the Northeast Corridor Commission established under 49 U.S.C. 24905, Amtrak, or public authorities providing commuter rail passenger transportation on the Northeast Corridor may request that the Board informally assist in securing outside professional mediation services in order to resolve disputes involving implementation of, or compliance with, the policy developed under 49 U.S.C. 24905(c)(1). With respect to a particular dispute, such a request for informal assistance in securing outside professional mediation services may be submitted to the Board:
[81 FR 85904, Nov. 29, 2016]