772
Opinion of the Court
Justice Kennedy delivered the opinion of the Court. Among the limitations the Constitution sets on the power of a single State to tax the multistate income of a nondomiciliary corporation are these: There must be "a 'minimal connection' between the interstate activities and the taxing State," Mobil Oil Corp. v. Commissioner of Taxes of Vt., 445 U. S. 425, 436-437 (1980) (quoting Moorman Mfg. Co. v. Bair, 437 U. S. 267, 273 (1978)), and there must be a rational relation between the income attributed to the taxing State and the intrastate value of the corporate business. 445 U. S., at 437. Under our precedents, a State need not attempt to isolate the intrastate income-producing activities from the rest of the business; it may tax an apportioned sum of the corporation's multistate business if the business is unitary. E. g., ASARCO Inc. v. Idaho Tax Comm'n, 458 U. S. 307, 317
ney General of Nebraska, Frankie Sue Del Papa, Attorney General of Nevada, Tom Udall, Attorney General of New Mexico, Robert Abrams, Attorney General of New York, Lacy H. Thornburg, Attorney General of North Carolina, Nicholas J. Spaeth, Attorney General of North Dakota, Lee Fisher, Attorney General of Ohio, Susan B. Loving, Attorney General of Oklahoma, Mark Barnett, Attorney General of South Dakota, Dan Morales, Attorney General of Texas, Paul Van Dam, Attorney General of Utah, Rosalie S. Ballentine, Attorney General of the Virgin Islands, Ken Eikenberry, Attorney General of Washington, Mario J. Palumbo, Attorney General of West Virginia, James E. Doyle, Attorney General of Wisconsin, and Joseph B. Meyer, Attorney General of Wyoming; for the State of Connecticut et al. by J. Joseph Curran, Jr., Attorney General of Maryland, and Gerald Langbaum and Andrew H. Baida, Assistant Attorneys General, Richard Blumenthal, Attorney General of Connecticut, Bonnie J. Campbell, Attorney General of Iowa, Scott Harshbarger, Attorney General of Massachusetts, Hubert H. Humphrey III, Attorney General of Minnesota, Ernest D. Preate, Jr., Attorney General of Pennsylvania, and James E. O'Neil, Attorney General of Rhode Island; for American General Corp. by Roy E. Crawford, Russell D. Uzes, and Karen A. Bain; for American Home Products Corp. et al. by William L. Goldman and Anne G. Batter; for Amway Corp. et al. by Timothy B. Dyk and Edward K. Bilich; for Chevron Corp. by Toni Rembe, Jeffrey M. Vesely, and C. Douglas Floyd; and for the Financial Institutions State Tax Coalition by Philip M. Plant and Haskell Edelstein.
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