Can a state official be personally sued to perform a duty imposed on him by federal law?

While in certain cases, a state official may be personally sued to perform a duty imposed on him by federal law, without transgressing the Eleventh Amendment immunizing a state from being sued, Ex parte Young, 209 U.S. 123, 152 (28 S.Ct. 441, 450, 52 L.Ed. 714) (1908); Rothstein v. Wyman, 467 F.2d 226, 236 (2d Cir. 1972), cert. denied, 411 U.S. 921 (93 S.Ct. 1552, 36 L.Ed.2d 315) (1973), that principle has no application in the circumstances to Tri-State or the heads of its organization.