The Secretary of Transportation may amend a regulation or change a requirement applicable to a railroad carrier for installing, maintaining, inspecting, or repairing a signal system under this chapter—
(1) when the carrier files with the Secretary a request for the amendment or change and the Secretary approves the request; or
(2) on the Secretary’s own initiative for good cause shown.
(Pub. L. 103–272, § 1(e), July 5, 1994, 108 Stat. 884.)