S.D. Codified Laws § 32-9-7
On receipt of an application under § 32-9-6 and payment of the commercial motor vehicle fee, required by this chapter, and upon satisfactory evidence that the applicant has complied with all laws, rules, and regulations of this state covering motor vehicles and motor carriers, the county treasurer or department shall issue to the applicant a receipt that identifies the motor vehicle, trailer, or semitrailer and shall assign a number to the vehicle. The number shall be endorsed upon the application and receipt. The county treasurer or department shall issue to the applicant a commercial motor vehicle certificate bearing the number. The certificate shall be placed and carried in the vehicle in a conspicuous place and is subject to examination upon demand by any officer of this state, county, or municipality. The county treasurer or department shall issue to the applicant two commercial motor vehicle plates for each motor vehicle. Each county treasurer office shall be stocked with commercial license plates issued pursuant to this section and commercial trailer license plates issued pursuant to § 32-9-8.1. If the plates are mailed, the applicant must pay seven dollars and fifty cents per license plate or set of plates if the plate is sent to the owner through the mail, or one dollar and fifty cents per decal or set of decals if the decal is sent to the owner through the mail. If the applicant requests that the plate or decal be express mailed, the applicant must pay any costs for the express mailing service. Each plate must set forth the amount of gross weight in figures, and be in colors and designs for each classification specified in § 32-9-15. Each plate must be securely fastened to the front and rear end of each commercial motor vehicle in a conspicuous place. The county treasurer shall deposit in the county general fund any fees received for mailing or expressing a plate or sticker. The department shall deposit all fees received for mailing or expressing the plates or stickers in the state motor vehicle fund. A violation of this section is a Class 2 misdemeanor.
SDCL 32-9-7