(1) An affidavit may, unless the court orders otherwise, be filed despite an irregularity in form, including a failure to use the approved form.
(2) An affidavit may, with the leave of the court, be used despite an irregularity in form and the affidavit must have on it a memorandum by the court or the appropriate associate or clerk that it was used by leave.
(3) An affidavit used under subrule (2) is afterwards taken as a regular affidavit.