S.D. Codified Laws § 47-1A-956
Unless otherwise provided in a plan of entity conversion of a domestic business corporation, after the plan has been adopted and approved as required by §§ 47-1A-950 to 47-1A-956, inclusive, and at any time before the entity conversion has become effective, it may be abandoned by the board of directors without action by the shareholders.
If an entity conversion is abandoned after articles of entity conversion or articles of charter surrender have been filed with the Office of the Secretary of State, but before the entity conversion has become effective, a statement that the entity conversion has been abandoned in accordance with this section, executed by an officer or other duly authorized representative, shall be delivered to the Office of the Secretary of State for filing prior to the effective date of the entity conversion. Upon filing, the statement shall take effect, and the entity conversion shall be deemed abandoned and does not become effective.
SDCL 47-1A-956