S.D. Codified Laws § 31-29-83
Nothing in §§ 31-29-61 to 31-29-83, inclusive, authorizes the state or any political subdivision to operate or maintain, directly or indirectly, any commercial activity in any safety rest area or information center. This section does not apply to any commercial advertising or media display pursuant to § 31-29-59, to a vending facility, vending soft drinks only, operated for the benefit of visually impaired vendors licensed by the Division of Service to the Blind and Visually Impaired or to a vending facility vending newspapers only. The Transportation Commission may promulgate rules pursuant to chapter 1-26 to establish a form upon which a newspaper vendor may apply for the placement of a vending machine; to establish provisions and standards for the location, operation, and maintenance of vending machines so as not to interfere with the use of the rest area or information center by the traveling public; and to maintain the orderly appearance of the vending facility.
SDCL 31-29-83