16 



4 



1 the Federal standard shall apply to such activity in such 



2 State. 



3 "(e) Whenever a State's standard is applicable within 



4 the jursidiction of that State it shall continue to be applicable 



5 until the Secretary, after public hearing, determines that it 



6 is not as stringent as the comparal)le Federal standard. He 

 '^ shall review all of the standards of each State for this purpose 



8 at least once each calendar year. 



9 " (f) The Secretary is authorized to issue new stand- 

 1^ ards and to amend existing standards from time to time as 

 ^^ he determines necessary, and such new or amended stand- 

 ^^ ards shall be considered as initial standards issued under 

 ^^ subsection (c) of this section for the purpose of their 

 ^^ application to the States under this section. 



15 "(g) The district courts of the United States shall 



^^ have jurisdiction to restrain violations of this section. Ac- 



^' tions to restrain such violations shall be brought by, and in, 



the name of the United States. In case of contumacy or 



1' refusal to obey a subpena upon any person under this sub- 

 on . 



section, the district court of the United States for any 



91 ... . 



district in which such person is found or resides or transacts 



" business, upon apphcation by the United States and after 



notice to such person, shall have jurisdiction to issue an 



order requirmg such person to appear and give testimony 



25 



or to appear and produce documents, and any failure to obey 



