Section 17A. Effective January 1, 2000, the clerk of each city and town shall, on or before the tenth day of the second month following every month in which marriages are solemnized, transmit to the state registrar upon forms furnished by him, the original record of such marriages and all documentary evidence. Certified copies of the marriages shall be retained by said clerk. If no marriages were filed for the month of the report, a report of such fact shall be transmitted to the state registrar. Prior to January 1, 2000, the clerk shall maintain all original documents and transmit to the state registrar a certified copy of each record of marriage. The clerk of each city and town shall annually, not later than April 15, report to the state registrar on forms furnished by him the number of intentions filed in the clerk’s office, and the number of intentions on which licenses were not issued, or, if issued, not returned to the clerk.