(1) Where it appears to the person witnessing an affidavit that the deponent is illiterate or blind, he shall certify in or below the jurat that:
(a) the affidavit was read in his presence to the deponent; and
(b) the deponent seemed to him perfectly to understand it; and
(c) the deponent made his signature or mark in the person's presence.
(2) Where an affidavit is made by an illiterate or blind deponent and a certificate in accordance with subrule (1) does not appear on the affidavit, it may not be used in evidence unless the Court is satisfied that the affidavit was read to the deponent and that he seemed perfectly to understand it.