SDCL § 32-12A-31: Application for renewal--Test for hazardous materials endorsement--Period when renewable.

Each person applying for renewal of a commercial driver license shall complete the application form required by § 32-12A-14, providing updated information and required certifications. If the applicant wishes to retain a hazardous materials endorsement, the written test for a hazardous materials endorsement shall be taken and passed. Each license is renewable one hundred eighty days prior to its expiration.