Here is the order in Rosebud Sioux Tribe v. Trump (D. Mont.):
Here are the materials in Dakota Rural Action v. Noem (D.S.D.):
Complaint posted here.
Here are the briefs on the United States’ and TransCanada’s Motions to Dismiss Rosebud and Fort Belknap’s treaty and jurisdiction claims regarding the Keystone XL Pipeline.
Here is the opinion in In re Application No. OP-0003:
From High Country News, here is “South Dakota pushes bills to prosecute ‘riot-boosting’ ahead of pipeline construction.”