Texas Water Code - WATER § 58.303. Authority to Determine Rules and Regulations

(1) methods, terms, and conditions of water service;

(2) applications for water;

(3) assessments, charges, fees, rentals, or deposits for maintenance and operation;

(4) payment and the enforcement of payment of the assessments, charges, fees, rentals, or deposits;

(5) furnishing irrigation water to persons who did not apply for it before the date of assessment if required;  and

(6) furnishing water to persons who wish to take water for irrigation in excess of their original applications or for use on land not covered by their original applications if required.