La. Stat. tit. 31 § 77
Current with operative changes from the 2024 Third Special Legislative Session
If a party purports to acquire a mineral servitude from a landowner when the right purportedly acquired is outstanding in another and the landowner either subsequently acquires the outstanding right or is the owner of the land at the time it is extinguished, the after-acquired title doctrine operates to vest the right in the party who purported to acquire it to the full extent of his title.
La. R.S. § 31:77