30 Tex. Admin. Code § 303.42
The commission will consider applications to amend water rights. Transfer of the point of diversion and/or place of use of water rights from the Lower and Middle Rio Grande to above Amistad Reservoir are prohibited; however, transfers may be made between the mainstem of the Lower Rio Grande and the mainstem of the Middle Rio Grande. Applications must meet all of the requirements for an original water permit as set out in Chapter 295 of this title (relating to Water Rights, Procedural) and Chapter 297 of this title (relating to Water Rights, Substantive).
Source Note:The provisions of this §303.42 adopted to be effective July 2, 1986, 11 TexReg 2890.