Here is the opinion in City of Duluth v. Fond du Lac Band of Lake Superior Chippewa II:

City of Duluth v. Fond du Lac Band of Lake Superior Chippewa 8th Circuit Decision

An excerpt:

We remand to the district court for its reconsideration of the Band’s Rule 60(b)(6) motion and direct it to consider all of the factors outlined here and in our prior remand order. Accordingly, the district court must give proper weight to the congressional intent that tribes be the primary beneficiaries of Indian gaming as well as other relevant factors we have previously identified. These include the facts that the City was on notice in 2009 of relevant actions and policies of the Gaming Commission and its warning in the 2011 Notice of Violation that the tribe would violate IGRA by making further rent payments to the city. As discussed in our prior City of Duluth opinion, such change in the governing law is also relevant to the question of whether an exceptional circumstance compels a grant of Rule 60(b)(6) relief. City of Duluth, 702 F.3d at 1154-55; see In re Pac. Far E. Lines, Inc., 889 F.2d 242 (9th Cir. 1989).

Briefs are here.