By: Zwiener H.B. No. 5186 A BILL TO BE ENTITLED AN ACT relating to information relied on by the Railroad Commission of Texas for purposes of rules involving rainfall estimates. BE IT ENACTED BY THE LEGISLATURE OF THE STATE OF TEXAS: SECTION 1. Subchapter C, Chapter 81, Natural Resources Code, is amended by adding Section 81.076 to read as follows: Sec. 81.076. RULES REFERENCING RAINFALL INTENSITY, DURATION, AND FREQUENCY. (a) This section applies only to a commission rule the adoption of which involved an evaluation of rainfall intensity, duration, or frequency. (b) The commission shall update rules as necessary to incorporate the latest available rainfall intensity, duration, and frequency data from the National Oceanic and Atmospheric Administration or a comparable source at least once every five years. (c) The commission shall update rules as necessary to incorporate the latest available rainfall intensity, duration, and frequency data from each new volume of the Precipitation-Frequency Atlas of the United States published by the National Oceanic and Atmospheric Administration. (d) During each rulemaking required by Subsection (b), the commission shall consider: (1) the value of costs avoided by the state as a result of updating the rainfall intensity, frequency, and duration data; (2) a description of the variance between the existing and newly available rainfall intensity, frequency, and duration data; and (3) the accuracy of the newly available rainfall intensity, frequency, and duration data in comparison to the existing rainfall intensity, frequency, and duration data. SECTION 2. Not later than January 1, 2026, the Railroad Commission of Texas shall adopt the first updated rules required by Section 81.076, Natural Resources Code, as added by this Act. SECTION 3. This Act takes effect September 1, 2025.