(1) The general rule is that an affidavit may contain only such facts as the deponent is able to prove from his or her own knowledge.
(2) An affidavit may contain statements of information and belief —
(a) if any of these rules so allows; and
(b) if the affidavit is for use in an application for summary judgment under Part 15 or any procedural or interlocutory application, provided that the affidavit indicates —
(i) which of the statements in it are made from the deponent's own knowledge and which are matters of information or belief, and
(ii) the source of any matters of information and belief.
(3) The court may order that any scandalous, irrelevant or otherwise oppressive matter be struck out of any affidavit.
(4) An affidavit containing any alteration may not be used in evidence unless all such alterations have been initialled both by the deponent and the person before whom the affidavit is sworn.