Statute treatment: 40 C.F.R. § 1500.2

Ranked leading cases interpreting this statute, drawn from 64 citation events across 57 distinct cases.

64citations total

57distinct interpreting cases

25distinct courts

2citations in last 5y

1974–2025year range

Top 20 leading cases

#1 Center for Biological Diversity v. National Highway Traffic Safety Administration (2008) ca9 139 own cites 2× in case

#2 Wildwest Institute v. Bull (2008) ca9 56 own cites 2× in case

#3 Sierra Club v. United States Army Corps of Engineers (2015) cadc 52 own cites 2× in case

#4 Sierra Club v. James M. Sigler, Etc., Pelican Terminal Company and Galveston Wharves, Intervenors-Appellees (1983) ca5 119 own cites 1× in case

#5 Trustees for Alaska v. Donald P. Hodel, Secretary, United States Department of the Interior (1986) ca9 69 own cites 1× in case

#6 California v. Block (1982) ca9 308 own cites 2× in case

#7 Fund for Animals v. Norton (2003) dcd 42 own cites 1× in case

#8 Natural Resources Defense Council, Inc. v. Morton (1974) dcd 42 own cites 1× in case

#9 City of New York v. United States Department of Transportation (1982) nysd 10 own cites 2× in case

#10 Citizens Against Toxic Sprays, Inc. v. Bergland (1977) ord 28 own cites 1× in case

#11 Center for Biological Diversity v. National Highway Traffic Safety Administration (2007) ca9 9 own cites 2× in case

#12 Greenpeace v. National Marine Fisheries Service (1999) wawd 22 own cites 1× in case

#13 Martin County, Florida v. Department of Transportation (2016) dcd 21 own cites 1× in case

#14 Woida v. United States (1978) mnd 18 own cites 1× in case

#15 United States v. 27.09 Acres of Land, in Town of Harrison (1991) nysd 17 own cites 1× in case

#16 Kettle Range Conservation Group v. United States Forest Service (2001) waed 15 own cites 1× in case

#17 Hoosier Environmental Council, Inc. v. U.S. Army Corps of Engineers (2000) insd 14 own cites 1× in case

#18 Sierra Nevada Forest Protection Campaign v. Rey (2008) caed 12 own cites 1× in case

#19 Citizens for Responsible Area Growth v. Adams (1979) nhd 11 own cites 1× in case

#20 Sierra Club v. United States Army Corps of Engineers (2006) flmd 9 own cites 1× in case

Ranking method: leading_score = ln(1 + own_citation_count) × √(mentions_in_case) × flag_factor, where flag_factor = 1.0 green · 0.6 unknown · 0.5 neutral · 0.4 yellow · 0.3 procedural · 0 red. Red-flagged cases excluded — their interpretation has been undermined and shouldn't lead the list. Top 20 returned per statute. Open any case for full G Cite, trajectory, and per-circuit treatment.