I found in the Jackson Parish court house records where my father sold 43 acres to someone in 1943 and that he had reserved one-half of the mineral rights.

Since this land sale took place before the current Louisiana law changes where you lose mineral rights after 10 years of non-production, did we lose the reserved mineral rights since there was no producing well on the property? Or was there any type of grandfather clause where mineral rights were kept by the original land owners without production?