Texas Transportation Code - TRANSP § 171.052. Creation by Counties and Municipalities

(a) The governing body of one or more counties and the most populous municipality in the most populous county may by concurrent order or ordinance create a district.  At the time of creation, a district must include:

(b) The order or ordinance creating the district:

(c) If the most populous county in the district contains a countywide navigation district and the presiding officer of the navigation district is jointly appointed by that county and the most populous municipality in that county, the order or ordinance creating the district must specify that:

(d) The common law doctrine of incompatibility does not apply to a director serving under Subsection (c)(1) with regard to the director's service for the freight rail district or for the navigation district.