A party to criminal proceedings who is intending to use an affidavit must serve a copy of it on each other party to the proceedings:
(a) at least 3 days before the occasion for using it arises; or
(b) if it is not practicable to comply with paragraph (a)--as soon as practicable before the occasion for using it arises.
Note: The copy of the affidavit need not be stamped.