Miss. Code § 61-5-33
For the purposes of Sections 61-5-33 through 61-5-41, unless otherwise qualified, the term "public agency" includes municipality, as defined in Section 61-5-3, and any agency of the state government and of the United States. The term "governing body" means the governing body of a county or municipality, and the head of the agency if the public agency is other than a county or municipality. All powers, privileges and authority granted to any municipality by the Municipal Airport Law may be exercised and enjoyed jointly with any public agency of this state, or of the United States to the extent that the laws of the United States permit such joint exercise or enjoyment. If not otherwise authorized by law, any agency of the state government when acting jointly with any municipality, may exercise and enjoy all of the powers, privileges and authority conferred by the Municipal Airport Law upon a municipality.
Miss. Code § 61-5-33