On June 1, 2011, the California State Assembly passed AB 52, which was initially introduced in December 2010.

Beginning January 1, 2012, the bill would require health care service plans and health insurers in California to obtain prior approval from the Department of Managed Health Care or the Department of Insurance for all proposed rate increases.

Under the proposed legislation, the Department of Managed Health Care and the Department of Insurance would be prohibited from approving any rate or rate change that is excessive, inadequate, or unfairly discriminatory.