In this section, the following definitions apply:

(1) Cooperating authority.— The term “cooperating authority” means a Department of Transportation operating administration or secretarial office that has expertise but is not the lead authority with respect to a proposed multimodal project.

(2) Lead authority.— The term “lead authority” means a Department of Transportation operating administration or secretarial office that has the lead responsibility for compliance with the National Environmental Policy Act of 1969 (42 U.S.C. 4321 et seq.) with respect to a proposed multimodal project.

(3) Multimodal project.— The term “multimodal project” has the meaning given the term in section 139(a) of title 23.

The authorities granted in this section may be exercised for a multimodal project, class of projects, or program of projects that are carried out under this title or title 23.

In considering the environmental impacts of a proposed multimodal project, a lead authority may apply categorical exclusions designated under the National Environmental Policy Act of 1969 (42 U.S.C. 4321 et seq.) in implementing regulations or procedures of a cooperating authority for a proposed multimodal project, subject to the conditions that—

the lead authority makes a determination, with the concurrence of the cooperating authority—

(A) on the applicability of a categorical exclusion to a proposed multimodal project; and

(B) that the project satisfies the conditions for a categorical exclusion under the National Environmental Policy Act of 1969 (42 U.S.C. 4321 et seq.) and this section;

(2) the lead authority follows the implementing regulations of the cooperating authority or procedures under that Act; and

the lead authority determines that—

(A) the proposed multimodal project does not individually or cumulatively have a significant impact on the environment; and

(B) extraordinary circumstances do not exist that merit additional analysis and documentation in an environmental impact statement or environmental assessment required under that Act.

A cooperating authority shall provide expertise to the lead authority on aspects of the multimodal project in which the cooperating authority has expertise.

(Pub. L. 97–449, § 1(b), Jan. 12, 1983, 96 Stat. 2419; Pub. L. 112–141, div. A, title I, § 1314(a), July 6, 2012, 126 Stat. 547; Pub. L. 114–94, div. A, title I, § 1310, Dec. 4, 2015, 129 Stat. 1397.)