Robert H. Jackson, Simpson Company v. Commissioner of Internal Revenue…
“ No mandate issues on denial of certiorari, and after a final decision the mandate does not issue until expiration of the 25-day period within which petition for rehearing may be filed. [8] If, therefore, we follow the practice heretofore observed, by which we regard denials of certiorari as qualified until the 25-day period expires, we put the denial and the decision on a generally equal basis except as Congress has seen fit to give the latter an additional thirty days before finality. ”
