S.D. Codified Laws § 20-9-51
Each fishing professional and fishing tournament sponsor shall post and maintain the following sign:
WARNING: Under South Dakota law, no fishing tournament sponsor or fishing professional is liable for an injury to, or the death of, a participant resulting from the inherent risks of fishing, pursuant to §§ 20-9-47 to 20-9-51 of the South Dakota Codified Laws.
The sign shall be placed in a clearly visible location on or near boat docks, registration tables, equipment rental stations, or where a fishing professional conducts fishing activities. The warning notice shall appear on the sign in black letters, with each letter being a minimum of one inch in height. Each written contract entered into by a fishing professional for the providing of professional services, instruction, or the rental of equipment, a boat, or watercraft to a participant, whether or not the contract involves fishing activities on or off the location or site of the fishing professional's business, shall contain in clearly readable print the warning notice provided in this section.
SDCL 20-9-51