S.D. Codified Laws § 47-14A-62
The reservation of a specified name shall be made by filing with the secretary of state an application, executed by the applicant, together with a duplicate copy, which may either be a signed or conformed copy, specifying the name to be reserved and the name and address of the applicant. If the secretary of state finds that the name is available for use by a business trust, the secretary shall reserve the name for the exclusive use of the applicant for a period of one hundred twenty days. Once having so reserved a name, the same applicant may again reserve the same name for successive one hundred twenty-day periods. The right to the exclusive use of a reserved name may be transferred to any other person by filing in the Office of the Secretary of State a notice of the transfer, executed by the applicant for whom the name was reserved, together with a duplicate copy, which may be either a signed or conformed copy, specifying the name to be transferred and the name and address of the transferee. The reservation of a specified name may be cancelled by filing with the secretary of state a notice of cancellation, executed by the applicant or transferee, together with a duplicate copy, which may be either a signed or conformed copy, specifying the name reservation to be cancelled and the name and address of the applicant or transferee. Any duplicate copy filed with the secretary of state, as required by this section, shall be returned by the secretary of state to the person who filed it or that person's representative with a notation thereon of the action taken with respect to the original copy thereof by the secretary of state.
SDCL 47-14A-62