(b) Service. Unless the court orders otherwise, a temporary restraining order together with the papers upon which it was based, and a notice of hearing for the preliminary injunction, shall be personally served in the same manner as a summons.
(c) Undertaking. Prior to the granting of a temporary restraining order the court may, in its discretion, require the plaintiff to give an undertaking in an amount to be fixed by the court, containing terms similar to those set forth in subdivision (b) of rule 6312, and subject to the exception set forth therein.