Louis Brandeis, Oklahoma Operating Company v. Love…
“ Whenever any business, by reason of its nature, extent, or the exercise of a virtual monopoly therein, is such that the public must use the same or its services, it is deemed a public business, and as such is subject to the duty to render its services upon reasonable terms without discrimination. If any public business violates such duty the Corporation Commission has power to regulate its rates and practices. Disobedience to an order establishing rates may be punished as a contempt and the Commission has power, sitting as a court, to impose a penalty therefor not exceeding $500 a day. ”
