A candidate in a Runoff Primary Election may withdraw as a candidate upon the filing of a written notice of withdrawal as a candidate with the secretary of the election board which accepted said candidate's declaration of candidacy. Said notice shall be signed by the candidate or the lawfully appointed personal representative or a lawfully appointed special administrator of any deceased candidate, whose signature shall be notarized by a notary public, and shall be filed on or before 5:00 p.m. on the Friday following the date of the Primary Election.