(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.