When a planning commission has control over subdivisions as provided in R.S. 33:111, the jurisdiction of the planning commission over plats shall be exclusive within the territory under its jurisdiction, and all statutory control over plats or subdivisions of land granted by other laws shall, in so far as in harmony with the provisions of this Sub-part, be deemed transferred to the planning commission of the parish or municipality, as the case may be.
La. R.S. § 33:117