Not later than 180 days after December 27, 2020, the Secretary shall issue final agency-specific procedures necessary to implement the principles and requirements and the interagency guidelines.
Every 5 years, the Secretary shall review and, where appropriate, revise the procedures required by subsection (a).
The term “interagency guidelines” means the interagency guidelines contained in the document finalized by the Council on Environmental Quality pursuant to section 1962–3 of this title in December 2014, to implement the principles and requirements.
The term “principles and requirements” means the principles and requirements contained in the document prepared by the Council on Environmental Quality pursuant to section 1962–3 of this title, entitled “Principles and Requirements for Federal Investments in Water Resources”, and dated March 2013.