Tex. Gov't Code § 1503.107
If the governing body of a municipality pledges the revenue of a property or facility of an airport to the payment of bonds issued under this subchapter, the governing body shall impose and collect a charge for services rendered in connection with the use of the property or facility in an amount at least sufficient to:
Added by Acts 1999, 76th Leg., ch. 227, Sec. 1, eff. Sept. 1, 1999.