A candidate to be voted on at a special election occasioned by a vacancy in the office of United States representative, shall be nominated by a convention duly called by the district central committee not less than twenty-five days prior to the date set for the special election. [S13, §1087-a24; C24, 27, 31, 35, 39, § 610; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §43.83 ] Section not amended; headnote revised