The DOI NEPA handbook and what stays in 43 CFR part 46
Interior's final rule cut about 80 percent of its 2008 NEPA regulations. The rest moved to the DOI NEPA Handbook, 516 DM 1, which is not codified and lacks the force of law[2][6][1]. Part 46 also keeps[2]:
43 CFR 46.210 and BLM categorical exclusions (CXs)
43 CFR 46.210 lists twelve departmental CEs; only (k), hazardous fuels reduction, unusable in the Ninth Circuit, and (l), post-fire rehabilitation up to 4,200 acres, need documentation[8]. BLM's own CXs do when set by statute, adopted under NEPA section 109 or marked with an asterisk[1].
Interior adds BLM CXs by Federal Register notice. Its timber salvage CX of August 24, 2026 rests on 34 past salvage EAs that all ended in FONSIs. It caps harvest at 1,000 acres, or a third of a disturbance over 3,000 acres up to 5,000, with at most 1 mile of new permanent road[9]. Other examples[1]:
Extraordinary circumstances at 43 CFR 46.215
43 CFR 46.215 names nine, including significant impacts on health, safety, natural resources, historic properties or listed species; highly uncertain or precedent-setting effects; limits on Indian sacred site access; and spread of noxious weeds[12]. If changing the action cannot remove one, the bureau prepares an EA or EIS[13][1]. Energy Policy Act oil and gas CXs skip this review[1].
Determination of NEPA adequacy (DNA): reusing an existing EA or EIS
A DNA records the official's finding that an existing EA or EIS already covers the action, with no new information that warrants more analysis. Appendix 1 asks whether the action matches an analyzed alternative and area, the analysis still holds, and the effects are similar; any "no" means more analysis[1].