Lawmakers passed AB 1641 with an overwhelming majority in both the Assembly and Senate. Authored by Assemblymember Brian Maienschein (D-San Diego), the bill will require such predators to be monitored while on a conditional release program from rehabilitation programs.

Both the American Civil Liberties Union California Action and California Attorneys for Criminal Justice opposed the legislation.

"Persons who are granted conditional release under the Sexually Violent Predator Act have been determined by the court, based upon expert opinion, not to pose a danger to the public," the ACLU wrote in a statement.

The group called the GPS tracking approach a "questionable practice," arguing that convicted sexual offenders who are granted conditional release have already served time in prison and receive treatment at Coalinga State Hospital.