Parliamentary Privileges Act 1891

Every such warrant shall contain a statement that the person therein mentioned has been adjudged guilty of contempt by the House, the President or Speaker whereof shall have issued the same, specifying the nature of such contempt in the words of this Act defining the same, or in equivalent words.

Every warrant shall be sufficient from which it can be reasonably collected that the person mentioned therein has been adjudged guilty of any of the contempts aforesaid, and no particular form shall be necessary to be observed in such warrant.