75-6-328. Exemption from taxation. Bonds issued pursuant to this part and the interest on the bonds, together with all properties and facilities of the authority owned or used in connection with the water supply, wastewater transportation, or treatment system, and all the money, revenue, and other income of the authority derived from the water supply, wastewater transportation, or treatment system are exempt from all taxation by the state or any county, municipality, political subdivision, or agency of the state, county, or municipality.