The United States Supreme Court finally reached the position of following the decision of _Ex Parte Plessy_ which justified the discrimination in railway cars on the grounds that it is not a badge of slavery contrary to the Thirteenth Amendment. This decision, in short, is: So long, at least, as the facilities or accommodations provided are substantially equal, statutes providing separate cars for the races do not abridge any privilege or immunity of citizens or otherwise contravene the Fourteenth Amendment of the United States Constitution. In such matters equality and not identity or community of accommodations is the extreme test of conformity to the requirements of the amendment. The regulation of domestic commerce is as exclusively a State function as the regulation of interstate commerce is a Federal function. The separate car law is an exercise of police power in the interest of public order, peace and comfort. It is a matter of legislative power and discretion with which Federal courts cannot interfere. In _Hennington_ v. _Georgia_,[34] it was later emphasized that it had been held that legislative enactments of the States, passed under the admitted police powers, and having a real relation to the domestic peace, order, health, and safety of their people, but which by their necessary operation, affect, to some extent, or for a limited time, the conduct of commerce among the States, are yet not invalid by force alone of the grant of power of Congress to regulate such commerce; and, if not obnoxious to some other constitutional provision or destructive of some right secured by the fundamental law, are to be respected in the courts of the Union until they are superseded and displaced by some act of Congress passed in execution of power granted to it by the Constitution. Of course, there was no other provision to which such laws could be contrary after the Supreme Court had whittled away the war amendments.