Tex. Gov't Code § 2176.052
Current with legislation from the 2023 Regular and Special Sessions signed by the Governor as of November 21, 2023.
An entity subject to Section 2176.051 may use a delivery method other than that provided under Section 2176.051 for delivering interagency mail to another entity subject to Section 2176.051 but may not use the United States Postal Service for the delivery unless required to do so under state or federal law.
Tex. Gov't. Code § 2176.052