Miss. Code § 17-17-315
The board may contract with and designate a local planning and development district in its jurisdiction to serve as the administrative office of the authority and to provide such staff support as may be necessary for the operation and administration of the authority. In addition, the board may contract with any county or municipality to provide support services and any member may contract with or as part of their service contract with the authority to provide such staff support, administrative and operational services as it deems advisable and on such terms as may be mutually agreed.
At the request of the board, the planning and development district shall coordinate and assist in the preparation and development of any solid waste management plan required by state law. A review of such plan shall be provided the board each year and periodically updated as determined to be necessary or as may be required by law.
Miss. Code § 17-17-315