(1) An application for relief by way of interpleader must be made:
(a) if a proceeding has been started against the stakeholder in relation to the property in dispute--by filing an interlocutory application in the proceeding; or
(b) if paragraph (a) does not apply--by filing an originating application, joining each claimant as a respondent.
(2) If an application is made under paragraph (1)(a), the interlocutory application must be served:
(a) on each party to the proceeding who claims any interest in the property in dispute; and
(b) personally on each claimant who is not a party to the proceeding.