15-6-13(e). Counterclaim maturing or acquired after pleading.A claim which either matured or was acquired by the pleader after serving his pleading may, with the permission of the court, be presented as a counterclaim by a supplemental pleading. Source: SD RCP, Rule 13 (e), as adopted by Sup. Ct. Order March 29, 1966, effective July 1, 1966.
South Dakota Legal Code