The secretary of the Department of Public Safety may promulgate rules on medical criteria and vision standards relating to the licensing of drivers under the provisions of this chapter. Source: SL 1974, ch 230 , § 4; SL 1986, ch 22 , § 4; SL 2003, ch 272 , § 23. 32-12-4.6, 32-12-4.7. Repealed by SL 1989, ch 265 , §§ 5, 6.