44 C.F.R. § 9.12
If the Agency decides to take an action in or affecting a floodplain or wetland, it shall provide the public with a statement of its final decision and shall explain the relevant factors considered by the Agency in making this determination.
(b) For actions for which an environmental impact statement is being prepared, the FEIS is adequate to constitute final notice in all cases except where:
(3) Significant new information becomes available in the interim between issuance of the FEIS and implementation of the proposed action.
If any of these situations develop, the Agency shall prepare a separate final notice that contains the contents of paragraph (e) of this section and shall make it available to those who received the FEIS. A minimum of 15 days shall, without good cause shown, be allowed for comment on the final notice.
(d) For all other actions, the finding shall be made in a document separate from those described in paragraphs (a), (b), and (c) of this section. Based on an assessment of the following factors, the requirement for final notice may be met in a cumulative manner:
(6) Similarity of the actions, i.e., to the extent that they are susceptible of common descriptions and assessments.
When a damaged structure or facility is already being repaired by the State or local government at the time of the Damage Survey Report, the requirements of Steps 2 and 7 (§§ 9.8 and 9.12) may be met by a single notice. Such notice shall contain all the information required by both sections.
(e) The final notice shall include the following:
[45 FR 59526, Sept. 9, 1980, as amended at 48 FR 29318, June 24, 1983]