Texas Special District Local Laws Code - SDLL § 3891.155. Sales and Use Tax

(a) The district may impose a sales and use tax if authorized by a majority of the voters of the district voting at an election held for that purpose. Revenue from the tax may be used for any district purpose for which ad valorem tax revenue is used.

(b) The district may not impose a sales and use tax if as a result of the imposition of the tax the combined rate of all sales and use taxes imposed by the district and other political subdivisions of this state having territory in the district would exceed the amount allowable by law at any location in the district.

(c) If the voters of the district approve the adoption of the tax at an election held on the same election date on which another political subdivision adopts a sales and use tax or approves an increase in the rate of its sales and use tax and as a result the combined rate of all sales and use taxes imposed by the district and other political subdivisions of this state having territory in the district would exceed the amount allowable by law at any location in the district, the election to adopt a sales and use tax under this chapter has no effect.

(d) Except as otherwise provided by this chapter, Chapter 321, Tax Code, applies to the imposition, computation, administration, enforcement, and collection of the sales and use tax imposed by this section.