La. Stat. tit. 33 § 2483
Each board, as soon as practicable (not to exceed a period of eighteen months) after this Part takes effect in the municipality, shall adopt a classification plan for the fire and police services of the municipality. Each classification plan shall consist of classes to be designated either by standard titles, ranks, or a combination thereof, for all positions included in the classified service for each of the fire and police services. The classification plan may be divided into groups of classes. The various classes of positions shall be arranged in each classification plan so as to show the principal and natural lines of promotion and demotion. The classification plan shall be adopted as rules of the board, in the manner provided by this Part for the adoption of rules. Rules creating the classification plan, future classifications, abolition of any classification, any amendment thereto, or revision thereof shall be adopted by a board only after consultation with the appointing authority, and the state examiner. The original classification plan to be established when this Part takes effect in a municipality shall be prepared, after consultation with the appointing authority, and submitted to the board for its approval and adoption, by the state examiner. The board may amend or revise the classification plans before adopting them. The state examiner shall advise and assist the board in all future classifications when requested to do so.
La. R.S. § 33:2483