La. Stat. tit. 2 § 16
Current with operative changes from the 2024 Third Special Legislative Session
If no appeal is taken from the order of the departments within the period fixed, the party against whom the order was entered shall have waived the right to have the reasonableness or lawfulness of the order reviewed by any court, and there shall be no trial of that issue in court in which suit may be instituted for the penalty for failure to comply with the order.
La. R.S. § 2:16
SEE ACTS 1985, NO. 889, §3.