Senate Bill 1 (SB 1), passed by the 75th Texas Legislature, mandated the Texas Water Development Board (TWDB) to implement a statewide water planning program to ensure that the water needs of all Texans are met looking forward 50 years. In response to this legislation, TWDB adopted state and regional water planning rules, delineated the state into sixteen regional areas, and selected the initial members for the Regional Water Planning Group serving in each area.