The district courts of the United States shall have jurisdiction specifically to enforce, and to prevent and restrain a person from violating, this chapter or any plan or regulation issued under this chapter.

A civil action to be brought under this section shall be referred to the Attorney General for appropriate action, except that the Secretary is not required to refer to the Attorney General a violation of this chapter or any plan or regulation issued under this chapter if the Secretary believes that the administration and enforcement of this chapter would be adequately served by administrative action under subsection (c) or by providing a suitable written notice or warning to any person committing the violation.