12-4-5.4. Registration--Driver license number or social security information required. Any person registering to vote shall provide his or her South Dakota driver license number on the voter registration form. If a person does not have a South Dakota driver license, the person shall provide the last four digits of his or her social security number on the voter registration form. If a person does not have a South Dakota driver license or social security number, the person may only register at the county auditor's office and shall sign a statement verifying the fact that he or she has neither a South Dakota driver license nor social security number. The statement shall be prescribed by the State Board of Elections.