H.B. No. 186 mandates the Texas Water Development Board to conduct a study by January 1, 2027, aimed at identifying methods to streamline the state environmental review process for flood control and drainage projects that are eligible for financial assistance from the flood infrastructure fund. Following the study, the Board is required to develop and implement internal guidelines and procedures to enhance the efficiency of the review process based on the findings.

The bill is set to expire on September 1, 2027, and it will take effect immediately if it receives a two-thirds majority vote from all elected members in both houses of the legislature. If the necessary vote for immediate effect is not achieved, the bill will come into effect on the 91st day after the legislative session concludes.