S.D. Codified Laws § 47-1A-1302.2

Notwithstanding any other provision of §§ 47-1A-1302 to 47-1A-1302.3 , inclusive, the articles of incorporation as originally filed or any amendment thereto may limit or eliminate appraisal rights for any class or series of preferred shares, but any such limitation or elimination contained in an amendment to the articles of incorporation that limits or eliminates appraisal rights for any of such shares that are outstanding immediately prior to the effective date of such amendment or that the corporation is or may be required to issue or sell thereafter pursuant to any conversion, exchange, or other right existing immediately before the effective date of such amendment does not apply to any corporate action that becomes effective within one year of that date if such action would otherwise afford appraisal rights.

Source: SL 2005, ch 239, § 283.