((a)) ** .—**

((1)) The Secretary of Transportation may—

((A)) inspect and test a signal system used by a railroad carrier; and

((B)) decide whether the system is in safe operating condition.

((2)) In carrying out this subsection, the Secretary may employ only an individual who—

((A)) has no interest in a patented article required to be used on or with a signal system; and

((B)) has no financial interest in a railroad carrier or in a concern dealing in railroad supplies.

((b)) ** .—** The 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.