(a) The county election officer may request that any registered voter whose signature does not appear in registration records sign and submit a signature card on a form prescribed by the secretary of state to be included with the voter's registration records.
(b) If a county election officer determines that the reliability of the registration records require a current signature of any voter, or if a registered voter's signature becomes subject to verification by the county election officer, and a similar signature is not on file for such voter, the county election officer may request that the voter sign and submit a current signature card, on a form prescribed by the secretary of state, to be included with the voter's registration records.