SDCL § 32-40-21: Insurer's right of contribution.

A motor vehicle insurer that defends or indemnifies a claim against a driver that is excluded under the terms of the insurer's policy, shall have a right of contribution against other insurers that provide motor vehicle insurance to the same driver in satisfaction of the coverage requirements of § 32-40-8 or 32-40-9 at the time of loss.