"4. (1) An order under sub rule 1 directing any party or under rule 29 directing any other person to make discovery shall not be made unless:
(a) the applicant for same shall have previously applied by letter in writing requesting that discovery be made voluntarily; and
(b) a reasonable period of time for such discovery has been allowed; and
(c) the party or person requested has failed, refused or neglected to make such discovery or has ignored such request.
Provided that in any case where by reason of the urgency of the matter or the consent of the parties, the nature of the case or any other circumstances which to the Court seem appropriate, the Court may make such order as appears proper, without the necessity for such prior application in writing.
(2) Any such discovery sought and agreed between parties or between parties and any other person shall subject to sub rule 4 below, be made in like manner and form and have such effect as if directed by order of the Court.
(3) In any case in which discovery has been sought and agreed and has not been made within the time agreed, the party who has sought same may make application pursuant to rule 21 provided that when seeking discovery the party requested was informed that:
(a) such voluntary discovery was being sought pursuant to Order 31 rule 12 sub rule 4;
(b) agreement to make discovery would require it to be made in like manner and form and would have such effect as if directed by order;
(c) failure to make the discovery may result in an application pursuant to rule 21;
and the Court may if satisfied that it is proper so to do, make such order under rule 12, 19 and 21 as is appropriate or such other order as appears just in the circumstances.
(4) An application for discovery whether under rule 12 (1) or (4) shall be made not later than twenty eight days after the action has been set down or in matters which are not set down twenty eight days after it has been listed for trial provided that the Court or the party requested may Order or agree, as the case may be, to extend the time for the application for discovery in any case in which it appears just and reasonable to do so.
(5) The costs of an application to Court for discovery in any case in which prior written application has not been made or in which application has not been made within the time provided, shall be in the discretion of the Court."