“ Petitioner had hired respondent to supervise Sky City's installation of roofs on two building projects located off the Acoma Indian Reservation. The New Mexico Supreme Court held that petitioner was not protected from suit by tribal sovereign immunity. 107 N.M. 174, 754 P.2d 845 (1988) . According to the New Mexico court, a State's "exercise of jurisdiction over a sovereign Indian tribe for off-reservation conduct is solely a matter of comity." ”

“ The New Mexico Supreme Court expressly recognized that Sky City Contractors was a subordinate economic organization of petitioner, 107 N.M., at 178, 754 P.2d, at 849 (citing White Mountain Apache, supra ) , yet nevertheless held that it was not immune from suit. ”

“ Gila River Pima-Maricopa Indian Community, 138 Ariz. 378, 380-381, 674 P.2d 1376, 1378-1379 (App.1983) (breach of contract action arising out of business transaction initiated off reservation) . The doctrine of tribal sovereign immunity, as applied by the Arizona courts, extends not only to an Indian tribe but also to a "subordinate economic organization" of the tribe. White Mountain Apache Indian Tribe v. ”