SDCL § 32-3A-3: Registration validation decal and numbering display requirements for boats--Violation as misdemeanor.

No person may operate or give permission for operation of a nonmotorized boat over twelve feet in length or a motorboat on the waters of this state unless a registration validation decal is displayed on each side of the bow of the boat. No person may operate or give permission for operation of a nonmotorized boat over eighteen feet in length or of a motorboat on the waters of this state unless the boat is numbered in accordance with this chapter and the identifying number set forth in the certificate of number is displayed on each side of the bow of the boat. A violation of this section is a Class 2 misdemeanor.