S.D. Codified Laws § 47-1A-953.3
The articles of entity conversion shall be delivered to the Office of the Secretary of State for filing, and shall take effect at the effective time provided in §§ 47-1A-123 and 47-1A-123.1. Articles of entity conversion filed under § 47-1A-953 or 47-1A-953.1 may be combined with any required conversion filing under the organic law of the domestic unincorporated entity if the combined filing satisfies the requirements of §§ 47-1A-953 to 47-1A-953.3, inclusive, and the other organic law.
If the converting entity is a foreign unincorporated entity that is authorized to transact business in this state under a provision of law similar to §§ 47-1A-1501 to 47-1A-1532, inclusive, its certificate of authority or other type of foreign qualification shall be cancelled automatically on the effective date of its conversion.
SDCL 47-1A-953.3