§ Rule 2227 Compulsory Joinder
Rule 2227. Compulsory Joinder
(a) Persons having only a joint interest in the subject matter of an action must be joined on the same side as plaintiffs or defendants.
(b) If a person who must be joined as a plaintiff refuses to join, he or she shall, in a proper case, be made a defendant or an involuntary plaintiff when the substantive law permits such involuntary joinder.