Anthony Kennedy,
Duro v. Reina — Opinion of the Court
“ Rather, as our discussion in Wheeler reveals, the retained sovereignty of the tribes is that needed to control their own internal relations, and to preserve their own unique customs and social order. The power of a tribe to prescribe and enforce rules of conduct for its own members "does not fall within that part of sovereignty which the Indians implicitly lost by virtue of their dependent status. The areas in which such implicit divestiture of sovereignty has been held to have occurred are those involving the relations between an Indian tribe and nonmembers of the tribe." ”
