Whenever it appears to the Secretary that any person has engaged, is engaged, or is about to engage in acts or practices constituting a violation of this chapter, or any rule or order thereunder, a civil action, may be brought, in accordance with , in the appropriate district court of the United States to enjoin such acts or practices, and, upon a proper showing, the court shall grant, without bond, mandatory or prohibitive injunctive relief, including interim equitable relief.1section 7192(c) of this title