In this area of Constitutional Law the principle asserted in the State Freight Tax Case,[651] that a State may not tax interstate commerce, is confronted with the principle that a State may tax all purely domestic business within its borders and all property "within its jurisdiction." Inasmuch as most large concerns prosecute both an interstate and a domestic business, while the instrumentalities of interstate commerce and the pecuniary returns from such commerce are ordinarily property within the jurisdiction of some State or other, the task before the Court in drawing the line between the immunity claimed by interstate business on the one hand and the prerogatives claimed by local power on the other has at times involved it in self-contradiction, as successive developments have brought into prominence novel aspects of its complex problem or have altered the perspective in which the interests competing for its protection have appeared. In this field words of the late Justice Rutledge, spoken in 1946, are especially applicable: "For cleanly as the commerce clause has worked affirmatively on the whole, its implied negative operation on State power has been uneven, at times highly variable. * * * Into what is thus left open for inference to fill, divergent ideas of meaning may be read much more readily than into what has been made explicit by affirmation. That possibility is broadened immeasurably when not logic alone, but large choices of policy, affected in this instance by evolving experience of federalism, control in giving content to the implied negation."[652] DEVELOPMENT OF THE APPORTIONMENT RULE