S.D. Codified Laws § 32-23-14.1
To be considered valid under the provisions of this chapter, the withdrawal or chemical analysis shall be performed at the direction of a law enforcement officer having lawfully arrested the person for a violation of § 32-23-1 or 32-23-21 and the chemical test analysis of the person's breath, if one is performed, shall be performed according to methods approved by the director of laboratories and by a person possessing a valid permit issued by the director of laboratories for this purpose. The director of laboratories may approve satisfactory techniques or methods to ascertain the qualifications and competence of anyone to conduct such analysis and issue permits which are subject to termination or revocation at the discretion of the director of laboratories.
SDCL 32-23-14.1