Mississippi Code Title 41. Public Health § 41-55-3

In acting jointly the board of supervisors of any such county acting for the county or supervisors district of the county, and the governing authorities of any city or town, acting for the city or town, are hereby authorized and empowered to contract with each other, for and on behalf of the political subdivisions or parts thereof which each represents, with respect to any and all things related to the matters and things authorized in Sections 41-55-1 through 41-55-11, and particularly to apportion and prorate the ownership of the property acquired or to be acquired in such a joint undertaking, and to determine the proportionate part of the cost of maintenance, support and operation to be assumed by each.