William O. Douglas,
Federal Power Commission v. Interstate Natural Gas Company Public Service Commission of Missouri…
“ Granting that a federal court does not have the power to regulate rates, it does not follow that in discharging the duty to distribute a fund of its own creation it is barred from an inquiry which has some aspects though I believe very minor ones-that would also appear in a rate proceeding. In short, issues that may be pertinent to a rate investigation before a regulatory commission are not therefore beyond the power of judicial inquiry when they arise in a totally different relation. ”
