Chevron lives.

In Brackeen v. Bernhardt, an opinion of enormous significance to Indian law, the Fifth Circuit found the Indian Child Welfare Act to be constitutional, reversing a district-court opinion that held otherwise. The Court also affirmed various Bureau of Indian Affairs regulations under the Chevron doctrine, noting, inter alia: “The mere fact that an agency interpretation contradicts a prior agency position is not fatal. Sudden and unexplained change, or change that does not take account of legitimate reliance on prior interpretation, may be arbitrary, capricious [or] an abuse of discretion. But if these pitfalls are avoided, change is not invalidating, since the whole point of Chevron is to leave the discretion provided by the ambiguities of a statute with the implementing agency.” No. 18-11479 (Aug. 9, 2019) (citation omitted). (My colleague Paulette Miniter and I assisted Professor Seth Davis of UC-Berkeley with an amicus brief in this case, in support of the result ultimately reached by the Court.)