Whenever one-fifth or more of the accredited delegates to, and present and voting at, any state or district convention, called for the purpose of choosing candidates for nomination for any elective office, upon motion, vote in favor of a roll call upon any matter or motion pending before such convention, or whenever a vote is to be taken on a party endorsement as between two or more candidates for nomination to any state or district office at any such convention, the clerk or secretary of such convention shall call such roll and shall keep a true record, in writing, of the vote of each delegate entitled to vote and voting at such convention or shall poll such convention by delegations if this procedure has been chosen by the convention pursuant to § 9-385a, and shall, at the conclusion of such roll call or call by delegations as the case may be, announce the result of such vote. Such clerk or secretary shall file such record at the headquarters of the state central committee, where it shall be preserved for a period of one hundred eighty days after the adjournment of such convention, and such record shall be open to public inspection at all reasonable times.