HB 3263 creates a methane emissions monitoring program under the Texas Emissions Reduction Plan. It directs the Texas Commission on Environmental Quality (TCEQ) to establish continuous emissions monitoring in areas with significant methane-producing infrastructure, such as oil and gas facilities and wastewater plants. The program includes real-time sensors to detect leaks and enforce compliance with state and federal emissions standards. Facilities found in violation must repair leaks within 30 days or face penalties. The bill also allocates funding from the Texas Emissions Reduction Plan to support program implementation​.