While there are no firm club boundaries in BAYSA, the map linked here shows the approximate BAYSA area and regions for the clubs.
East Lake Houston is a separate association from BAYSA but has teams that play BAYSA scheduled games.
Players are free to join any club they wish. Select a club name to go to that club's web site.
Soccer registration is done through the regional clubs within BAYSA. Questions about registration should be directed to the club in your area.