Commonwealth Consolidated Regulations Commonwealth Consolidated Regulations25.02.1 The party seeking an order to show cause shall be called the plaintiff and other parties shall be called defendants.
25.02.2 Where a writ of mandamus or prohibition is sought against an officer of the Commonwealth the officer shall be described in the title of the proceeding by the name of the office held.
25.02.3 In all cases other than those for which rule 25.02.2 provides, a defendant may be described by name or by the name of the office held or both.