Tex. Loc. Gov't Code § 572.014

A participating public entity is entitled to each constitutional or statutory ad valorem or other tax exemption attributable to the jointly owned facility or to a property or service bought, sold, leased, or used to construct, maintain, repair, or operate the facility to the extent that the entity would have been exempt from the tax if the entity's undivided interest were an entire interest in the facility or in the property or service. The entity is entitled to any applicable exemption certificate or statement provided by law to claim or prove the exemption.