74:21:02:54Certification at a
Section · Administrative Rules of South Dakota · View on sdlegislature.gov ↗
higher grade. Certified operators who desire to become certified in a higher grade must satisfactorily complete the eligibility requirements and examination for the higher grade before a certificate will be issued.
Source: 6 SDR 49, effective November 19, 1979; 13 SDR 129, 13 SDR 141, effective July 1, 1987.