39 CFR § 775.12 - Time frames for environmental impact statement actions.
(a) Each week the EPA publishes in the Federal Register a notice of the draft and final environmental impact statements received in that office during the preceding week. The minimum time periods for decision on an action, specified in paragraphs (b) through (d) of this section, are calculated from the date of publication of an EPA notice of receipt of the relevant impact statement.
(b) A decision on a proposed action may not be made or recorded until the later of the following dates: 90 days after publication of the notice described in paragraph (a) of this section for a draft statement or 30 days after publication of the notice for a final statement.
(c) If a final statement is filed with the EPA within 90 days after a draft statement is filed, the 30 day period and the 90 day period may run concurrently.
(d) A minimum of 45 days must be allowed for comments on draft statements.