Legislators have approved an expansion of pay-to-play rules in response to a controversy involving suspended Sen. Ronald S. Calderon and his brother, former Assemblyman Tom Calderon. The two Democrats from Montebello made large campaign donations to most members of the Central Basin Municipal Water District Board before it approved a consulting contract for Tom Calderon.

Assembly Bill 1728 will add elected water board members throughout California to the list of officers who may not accept campaign contributions of more than $250 from donors with business pending before their boards. Officers must abstain from voting on pending business matters if such a donation has been received during the previous year.

The legislation now goes to Gov. Jerry Brown.