Texas Water Code - WATER § 5.702. Payment of Fees Required When Due

(a) A fee due the commission under this code or the Health and Safety Code shall be paid on the date the fee is due, regardless of whether the fee is billed by the commission to the person required to pay the fee or is calculated and paid to the commission by the person required to pay the fee.

(b) A person required to pay a fee to the commission may not dispute the assessment of or amount of a fee before the fee has been paid in full.