((a)) ** .—** The Secretary may prescribe, in regulations, standards for determining whether a contractor is a manufacturer or regular dealer with respect to materials, supplies, articles, or equipment to be manufactured or furnished under, or used in the performance of, a contract entered into by an agency of the United States.

((b)) ** .—** An interested person has the right of judicial review of any legal question relating to interpretation of the terms “regular dealer” and “manufacturer” as defined pursuant to subsection (a).