Proof of execution where attestation clause defective.
13. If there is no attestation clause, or if the attestation clause is insufficient, the probate registrar shall require an affidavit from at least one of the subscribing witnesses, if either of them is living, to prove that the will was, in fact, executed in accordance with those enactments. The affidavit shall be carefully typed and form part of the probate, so that the probate may be a complete document on the face of it.