When used in this chapter, unless the context otherwise requires -
No person shall be deemed to be a holding company under clause (B) of paragraph (7) of subsection (a) of this section, or a subsidiary company under clause (B) of paragraph (8) of such subsection, or an affiliate under clause (D) of paragraph (11) of such subsection, unless the Commission, after appropriate notice and opportunity for hearing, has issued an order declaring such person to be a holding company, a subsidiary company, or an affiliate, or declaring a class of which such person is a member to be affiliates. Such an order shall not become effective for at least thirty days after the mailing of a copy thereof to the person thereby declared to be a holding company, subsidiary company, or affiliate; or, in the case of determination of affiliates by classes, until at least thirty days after appropriate publication thereof in such manner as the Commission shall determine. Whenever the Commission, on its own motion or upon application by the person declared to be a holding company, subsidiary company, or affiliate, finds that the circumstances which gave rise to the issuance of any such order no longer exist, the Commission shall by order revoke such order.
No provision in this chapter shall apply to, or be deemed to include, the United States, a State, or any political subdivision of a State, or any agency, authority, or instrumentality of any one or more of the foregoing, or any corporation which is wholly owned directly or indirectly by any one or more of the foregoing, or any officer, agent, or employee of any of the foregoing acting as such in the course of his official duty, unless such provision makes specific reference thereto.