Except as otherwise expressly provided by law, the seal of a court need not be affixed to any proceeding therein, or to any document, except to the following:
(a) A writ.
(b) A summons.
(c) A warrant of arrest.
(Amended by Stats. 1988, Ch. 1199, Sec. 2. Operative July 1, 1989, by Sec. 119 of Ch. 1199.)