Tennessee Code Title 64. Regional Authorities § 64-1-605

(a) The board of directors shall set a per thousand-gallon membership fee to charge water systems for finished water pumped to a water system from the upper Duck River watershed.

(b) The board of directors shall set the membership fee at a rate sufficient to fund only:

(c) The board of directors shall review the membership fee at least once every five (5) years and when appropriate revise the fee to ensure sufficient funding for increased or new operating, program, or project costs.

(d) A water system shall pay to the agency the membership fee based on the finished water pumped to a water system coming from a water treatment plant that withdraws water from the upper Duck River watershed;  provided, that the fee must not apply to water re-use from a wastewater treatment plant or recycled water from a water treatment plant.

(e) The board of directors shall designate the method of payment and payment schedule for the membership fee.  The proceeds of membership fee payments must be deposited into the trust fund maintained pursuant to § 64-1-604(g)(2).