(a) In exclusion proceedings involving medical services provided under Part B of the Act only, the provider may apply to the administrative law judge for the issuance of subpoenas upon a showing of good cause therefore.
(b) A certification of a request for an advisory opinion concerning professional medical standards, medical ethics or medical regulation to a competent recognized or professional organization or federal, state or local regulatory agency may be made:
(1) As to an issue properly designated by the provider, in the sound discretion of the administrative law judge, provided that the request will not unduly delay the proceedings;
(2) By OWCP on its own motion either before or after the institution of proceedings, and the results thereof shall be made available to the provider at the time that proceedings are instituted or, if after the proceedings are instituted, within a reasonable time after receipt. The opinion, if rendered by the organization or agency, is advisory only and not binding on the administrative law judge.