(1) The powers under rules 33.7 to 33.16 extend to the making of an order authorising the examination of a witness or person on oath before a judge sitting in court as if for the trial of the claim.
(2) In proceedings in which preliminary acts fall to be filed under rule 72.19, an order must not be made authorising any examination of a witness before the preliminary acts have been filed unless for special reasons the court otherwise orders.
(3) Unless the court otherwise directs, affidavits made for the purpose of rules 72.20(5), 72.22(3) and 72.36(2) may contain statements of information and belief provided that the sources and grounds are given.