The Secretary shall approve the release of funds subject to the procedures authorized by this section only if, at least 15 days prior to such approval and prior to any commitment of funds to such projects [1] the jurisdiction or insular area has submitted to the Secretary a request for such release accompanied by a certification which meets the requirements of subsection (c). The Secretary’s approval of any such certification shall be deemed to satisfy his responsibilities under the National Environmental Policy Act of 1969 [42 U.S.C. 4321 et seq.] and such other provisions of law as the regulations of the Secretary specify insofar as those responsibilities relate to the releases of funds for projects to be carried out pursuant thereto which are covered by such certification.
In the case of assistance to units of general local government from a State, the State shall perform those actions of the Secretary described in subsection (b) and the performance of such actions shall be deemed to satisfy the Secretary’s responsibilities referred to in the second sentence of such subsection.
To the extent practicable and permitted by law, the Secretary shall ensure that a project that has undergone an environmental review under this section shall not be subject to a duplicative environmental review solely due to the addition, substitution, or reallocation of other sources of Federal assistance, if the scope, scale, and location of the project remain substantially unchanged.
The Secretary shall, by regulation, provide for coordination of environmental review responsibilities with other Federal agencies to streamline interagency compliance and avoid unnecessary duplication of effort under the National Environmental Policy Act of 1969 (42 U.S.C. 4321 et seq.) and other applicable laws.
A project may not be subject to an environmental review under this section if a substantially similar review has already been completed by an entity designated under section 5304(g)(1) of this title or by another entity the Secretary determines to have equivalent authority, if the scope, scale, and location of the project remain substantially unchanged.