After notifying a State of the designation referred to in section 7912 of this title, the Secretary subject to section 7923 of this title, is authorized to enter into cooperative agreements with such State to perform remedial actions at each designated processing site in such State (other than a site located on Indian lands referred to in section 7915 of this title). The Secretary shall, to the greatest extent practicable, enter into such agreements and carry out such remedial actions in accordance with the priorities established by him under section 7912 of this title. The Secretary shall commence preparations for cooperative agreements with respect to each designated processing site as promptly as practicable following the designation of each site.
Each cooperative agreement under this section shall contain such terms and conditions as the Secretary deems appropriate and consistent with the purposes of this chapter, including, but not limited to, a limitation on the use of Federal assistance to those costs which are directly required to complete the remedial action selected pursuant to section 7918 of this title.
Each cooperative agreement under this section shall require the State to assure that the Secretary, the Commission, and the Administrator and their authorized representatives have a permanent right of entry at any time to inspect the processing site and the site provided pursuant to section 7914(b)(1) of this title in furtherance of the provisions of this subchapter and to carry out such agreement and enforce this chapter and any rules prescribed under this chapter. Such right of entry under this section or section 7916 of this title into an area described in section 7911(6)(B) of this title shall terminate on completion of the remedial action, as determined by the Secretary.
Each agreement under this section shall take effect only upon the concurrence of the Commission with the terms and conditions thereof.