The quarantine forbids any birds transiting through LAX on their way to anywhere.
There are 3 counties in SoCal that are quarantined: Los Angeles County, Riverside County and San Bernardino County.
Dr. Jones, the state chief veterinarian referred to the 6 months without any new detections consideration just before the most recent outbreak in the San Bernardino feed store. It wasn't, as I recall, an official publication but a reply to a newspaper reporter. She was remarking on the long interval during which they had detected no new cases and she suggested she might lift the quarantines after the next scheduled official assessment that occur at 6 month intervals. I wish I could find that for you but I haven't been able to. I'm working purely from memory.