Interesting read.  Looks like the LA Mineral Code's wording isn't necessarily an umbrella protection, that lease terms need to be spelled out in detail.

http://www.louisianalawblog.com/legacy-oil-field-sites-louisiana-su...

"The Castex decision clarifies some, but not all, of the obligations of a mineral lessee with respect to surface restoration. The decision reaffirms that where a mineral lease expressly authorizes and grants the lessee the right to alter the surface of the leased premises but the lease is silent regarding restoration, Article 122 of the Louisiana Mineral Code only imposes a duty to restore the surface to its original condition where there is evidence of unreasonable or excessive use."

just one opinion,  80)