CA SB1321

Requires that felony sentences be served in state prison if the defendant committed the felony while under mandatory supervision.

Adds mandatory supervision status as a new trigger for state prison sentencing, alongside existing triggers such as prior serious/violent felony convictions, sex offender registration requirements, and white collar crime enhancements.

Applies to felonies punishable by county jail imprisonment under Penal Code Section 1170(h), which currently allows county jail sentences unless specific conditions are met.

Takes effect January 1, 2017, and applies prospectively to defendants sentenced on or after that date.