It shall be the duty of the person solemnizing the marriage to furnish to either of the contracting parties one of the three copies of the marriage contract referred to in article 55, and to send another copy of the document not later than fifteen days after the marriage took place to the local civil registrar concerned, whose duty it shall be to issue the proper receipt to any person sending a marriage contract solemnized by him, including marriages of an exceptional character. The official, priest, or minister solemnizing the marriage shall retain the third copy of the marriage contract, the marriage license and the affidavit of the interested party regarding the solemnization of the marriage in a place other than those mentioned in article 57 if there be any such affidavit, in the files that he must keep. (16a)