49 U.S.C. § 20504 — Inspection, testing, and investigation

1. (a)Systems in Use
   1. (1)The Secretary of Transportation may—
      1. (A)inspect and test a signal system used by a railroad carrier; and
      2. (B)decide whether the system is in safe operating condition.
   2. (2)In carrying out this subsection, the Secretary may employ only an individual who—
      1. (A)has no interest in a patented article required to be used on or with a signal system; and
      2. (B)has no financial interest in a railroad carrier or in a concern dealing in railroad supplies.
2. (b)Systems Submitted for Investigation and TestingThe Secretary may investigate, test, and report on the use of and need for a signal system, without cost to the United States Government, when the system is submitted in completed shape for investigation and testing.