30 Tex. Admin. Code § 295.5
The total amount of water to be used shall be stated in definite terms, i.e., a definite number of acre-feet annually or, in the case of a seasonal, emergency, or temporary water right application, over the period for which application is made. The purpose or purposes of each use shall be stated in definite terms. If the water is to be used for more than one purpose, the specific amount to be used annually for each purpose shall be clearly set forth. If the application requests authorization to use water for multiple purposes, the application shall expressly state an annual amount of water to be used for the multiple purposes as well as for each purpose of use. If the amount to be consumptively used is less than the amount to be diverted, both the amount to be diverted and the amount to be consumptively used shall be specified.
30 Tex. Admin. Code § 295.5