S.D. Codified Laws § 1-41-27
The department may accept a document with an electronic signature if submitted in that form by the signatory to comply with state environmental regulatory requirements. The department shall provide for the authenticity of each electronic signature by adhering to any standards established by the Bureau of Information and Telecommunications pursuant to §§ 53-12-47 and 53-12-50 or any other standards the department may establish by rules promulgated pursuant to chapter 1-26. Any entity submitting a report to the department as required by the United States Environmental Protection Agency or a state environmental program approved by the United States Environmental Protection Agency may satisfy reporting requirements by cross-media electronic reporting in lieu of paper-based reporting as provided for by the United States Environmental Protection Agency pursuant to the standards promulgated in the Federal Register, Vol. 70, No. 197 (October 13, 2005--40 CFR Parts 3, 9, 51 et al.--Cross-Media Electronic Reporting; Final Rule).
SDCL 1-41-27