SDCL § 47-11B-3: Optometric license required for officers, directors and shareholders.

All of the officers, directors, and shareholders of a corporation created by this chapter shall at all times be persons registered pursuant to the provisions of chapter 36-7. No person who is not so licensed shall have any part in the ownership or control of such corporation, nor may any proxy to vote any shares of such corporation be given to a person who is not so registered.