Environmental assessment for final changes to the definition of "destruction or adverse modification" of critical habitat in the Endangered Species Act regulations (50 CFR 402.02) Final environmental assessment for the revision of the definition of "destruction or adverse modification" of critical habitat in the Endangered Species Act regulations (50 CFR 402.02)

"The U.S. Fish and Wildlife and National Marine Fisheries Service propose to publish a final rule to revise the regulatory definition of "destruction or adverse modification" of critical habitat to replace the previous definition, which was invalidated by U.S. Circuit Courts in 2001 and 2004. This rule formalizes the 2004 and 2005 internal guidance issued separately by the U.S. Fish and Wildlife and National Marine Fisheries, respectively"--Cover letter summary.