If an applicant claims relief to which any other person is entitled jointly with the applicant:
(a) each person so entitled must be joined as a party to the proceeding; and
(b) any person so entitled who does not consent to being joined as an applicant must be made a respondent to the proceeding.
Note: For actions in relation to joint contracts, where one of the contractors is bankrupt, see section 62 of the Bankruptcy Act 1966 .