An eligible elector may register to vote by appearing personally and completing a voter registration form at the office of the commissioner in the county in which the person resides, at a motor vehicle driver’s license station, including any county treasurer’s office that is participating in county issuance of driver’s licenses under chapter 321M , or at any voter registration agency. A separate registration form shall be signed by each individual registrant. 94 Acts, ch 1169, §8 ; 98 Acts, ch 1073, §12 ; 98 Acts, ch 1143, §12, 26