Joinder of Parties

Joinder of Parties Sec. 1009. In any proceeding for the enforcement of the provisions of this Act, or any rule, regulation, requirement, or order thereunder, or any term, condition, or limitation of any certificate or permit, whether such proceedings be instituted before the Board or be begun originally in any court of the United States, it shall be lawful to include as parties, or to permit the intervention of, all persons interested in or affected by the matter under consideration; and inquiries, investigations, orders, and decrees may be made with reference to all such parties in the same manner, to the same extent, and subject to the same provisions of law as they may be made with respect to the persons primarily concerned.