La. Stat. tit. 37 § 5
In the case of a vacancy in the office of the director, the vacancy shall be filled by appointment by the governor from a list of eligible persons submitted to him by the State Department of Civil Service.
The appointment shall be made on the sole basis of the qualifications of the appointee to administer the affairs of the department for which he is appointed as fixed by the Civil Service Commission. However, he shall not be a practitioner of any of the professions or vocations subject to testing or regulation by the department and shall not have any financial interest as teacher, officer or stockholder in any college or other school which offers any course of instruction or training in any of the professions or vocations so subject.
La. R.S. § 37:5