(A) In an action to partition real property under Article 1, upon motion of a party or from statements contained in the pleadings, the court shall determine, in a preliminary hearing held after the filing of the action, whether the property is heirs' property. If the court determines that the property is heirs' property, the partition of the heirs' property is governed by the provisions of this article, unless all cotenants otherwise agree in a record.
(B) This article supplements the provisions of Article 1 and if the provisions of this article differ from the provisions of Article 1, the provisions of this article control for partitions of heirs' property.