S.D. Codified Laws § 36-21A-30
A license shall be granted only to persons of reputable character who have attained the age of eighteen years; who are competent to transact the business of a licensee in a manner as to safeguard the interest of the public; and whose application for a license has not been rejected, except for the reason that the applicant failed any examination required by this chapter, in this or any other state within one year prior to the date of application; or whose license has not been revoked in this or any other state within five years prior to date of application. No one except a citizen of the United States of America, or resident of South Dakota, is eligible to secure a license as a broker, except as otherwise provided by this chapter.
SDCL 36-21A-30