§ 1004. When joinder unnecessary. Except where otherwise prescribed by
order of the court, an executor, administrator, guardian of the property
of an infant, committee of the property of a judicially declared
incompetent, conservator of the property of a conservatee, trustee of an
express trust, insured person who has executed to his insurer either a
loan or subrogation receipt, trust agreement, or other similar
agreement, or person with whom or in whose name a contract has been made
for the benefit of another, may sue or be sued without joining with him
the person for or against whose interest the action is brought.