Water Authorities - As enacted, generally authorizes the board of directors of a municipal energy authority to, as part of the transfer of a water and wastewater system, adopt and assume all or any portion of such regulatory powers, authority, duties, obligations, and oversight over the water and wastewater operations as were applicable to the municipal water and wastewater system pursuant to ordinances, resolutions, or other rules or policies that were in effect immediately prior to the transfer of such system to the authority; authorizes later amendment to such rules, regulations, and requirements. - Amends TCA Title 5; Title 6; Title 7 and Title 68.