SACRAMENTO — Gov. Arnold Schwarzenegger has vetoed a bill prompted by the Diablo Valley College scandal that would have required the state's 110 community colleges to consider a model grade-changing policy.

Schwarzenegger, who nixed the proposal Sunday, noted in his veto message that the bill was "unnecessary" because nothing in existing law prevents the state chancellor's office from distributing a model policy. The bill, AB 1754 was approved 55-23 by the Assembly and 21-12 by the Senate.

Proposed by Assemblywomen Mary Hayashi, D-Castro Valley, and Loni Hancock, D-Berkeley, and Assemblyman Mark DeSaulnier, D-Concord, the bill was a response to a six-year-long grade-changing scheme at DVC. Hundreds of grades were changed by student employees in exchange for money.

More than 50 people were charged with felonies after an investigation.

Matt Krupnick covers higher education. Reach him at 925-943-8246 or mkrupnick@bayareanewsgroup.com.