Sec. 4. Not later than the 20th day before the trial begins in a proceeding in which a chain of custody affidavit under this article is to be introduced, the affidavit must be filed with the clerk of the court and a copy must be provided by fax, secure electronic mail, hand delivery, or certified mail, return receipt requested, to the opposing party. The affidavit is not admissible under Section 1 if, not later than the 10th day before the trial begins, the opposing party files a written objection to the use of the affidavit with the clerk of the court and provides a copy of the objection by fax, secure electronic mail, hand delivery, or certified mail, return receipt requested, to the offering party.