30 Tex. Admin. Code § 304.61
Under Texas Water Code, § 11.329, all holders of water rights that are administered by a watermaster shall reimburse the commission for the expense of watermaster operations. An assessment account shall be established for each water right holder for each water right authorization by category of use. The commission shall not assess costs against a holder of a non-priority hydroelectric right that owns or operates privately-owned facilities that collectively have a capacity of less than two megawatts. The assessment for each assessment account shall be the sum of a uniform base charge and, as applicable for that assessment account, either a use fee or a storage fee, or both. The executive director shall file with the commission a copy of the proposed budget. Following a public meeting, the commission shall issue an order for each water division or group of water divisions, as the commission may determine to be appropriate, approving the assessment income needed for the watermaster operations for the assessment period under consideration. The order shall also specify the base charge per assessment account and the reinstatement fee for delinquent assessment payment.
30 Tex. Admin. Code § 304.61