But meantime other formulas had emerged from the judicial smithy, several of which are brought together into something like a doctrinal system, in Justice Hughes' comprehensive opinion for the Court in the Minnesota Rate Cases,[532] decided in 1913. "Direct" regulation of foreign or interstate commerce by a State is here held to be out of the question. At the same time, the States have their police and taxing powers, and may use them as their own views of sound public policy may dictate even though interstate commerce may be "incidentally" or "indirectly" regulated, it being understood that such "incidental" or "indirect" effects are always subject to Congressional disallowance. "Our system of government," Justice Hughes reflects, "is a practical adjustment by which the National authority as conferred by the Constitution is maintained in its fall scope without unnecessary loss of local efficiency."[533] In more concrete terms, the varied formulas which characterize this branch of our Constitutional Law have been devised by the Court from time to time in an endeavor to effect "a practical adjustment" between two great interests, the maintenance of freedom of commerce except so far as Congress may choose to restrain it, and the maintenance in the States of efficient local governments. Thus, while formulas may serve to steady and guide its judgment, the Court's real function in this area of judicial review is essentially that of an arbitral or quasi-legislative body. So much so is this the case that in 1940 three Justices joined in an opinion in which they urged that the business of drawing the line between the immunity of interstate commerce and the taxing power of the States "should be left to the legislatures of the States and the Congress," with the final remedy in the hands of the latter.[534] State Taxing Power and Foreign Commerce BROWN _v._ MARYLAND; THE ORIGINAL PACKAGE DOCTRINE