Harlan F. Stone,
West India Oil Company v. Domenech…
“ Since the right to tax imports in the original package, granted Puerto Rico by the Butler Act, merely makes goods in the original package in Puerto Rico taxable as other goods in the common mass of taxable property, the Butler Act gives to Puerto Rico no broader power to tax oil sales than was possessed by New York, by virtue of its sovereign power, in the Gulf Oil case. McGoldrick v. Berwind-White Co., 309 U.S. 33, 60 S.Ct. 388, 84 L.Ed. 565, 128 A.L.R. 876. Nothing requires us to frustrate the legislative policy of free competition in world markets. ”
