(1) With the court’s leave, a person may, at any time, deliver interrogatories—(a) to a party to a proceeding, including a third party under chapter 6 , part 6 ; or(b) to help decide whether a person is an appropriate party to the proceeding or would be an appropriate party to a proposed proceeding—to a person who is not a party.
(2) The number of interrogatories may be more than 30 only if the court directs a greater number may be delivered.
(3) For this rule, each distinct question is 1 interrogatory.