La. Code Civ. Proc. art. 1066
Current with changes from the 2024 legislative session effective on or before 7/1/2024, from Acts 2,3, 6-535, and 580-647
An action which either matured or was acquired by the defendant in the principal action after answer may be presented, with the permission of the court, as a reconventional demand by supplemental pleading.
La. C.P. § 1066