Here is the opinion. And the briefs:
The underlying merits decision from the D.C. Circuit vacating a Bush-era EPA mercury rule is here. BLT coverage is here.
Here are the intervening tribes and organizations:
Bay Mills Indian Community, Grand Traverse Band of Ottawa and Chippewa Indians, Jamestown S’Klallam Tribe, Lac Courte Oreilles Band of Lake Superior Chippewa Indians, Little River Band of Ottawa Indians, Little Traverse Bay Bands of Odawa Indians, Lower Elwha Klallam Tribe, Lummi Nation, Minnesota Chippewa Tribe, National Congress of American Indians, Nisqually Tribe, and Swinomish Indian Tribe Community