S.D. Codified Laws § 16-2-58

For any petition or motion to modify final orders for child support, child custody, child visitation, or spousal support, the clerk of courts shall collect the sum of fifty dollars as a commission on equal access to our courts surcharge. The surcharge shall be collected from the person filing the motion or petition at the time of filing. The surcharge shall be collected by the clerk in the manner in which other fees are collected. No surcharge may be collected in any civil action or proceeding commenced by the state, county, a municipality, or a school district. The surcharge may be waived pursuant to the provisions of §§ 16-2-29.2 and 16-2-29.3.