For something this important, I'd recommend calling the California Medical Board for the information if you cannot find it on their website or application.
But you're going to need one anyway to work in the US, so might as well start the process.
A reminder that posting the same query/theme in multiple threads is a violation of the Terms of Service agreement you signed when you joined SDN. Since there is an active thread in the ERAS/NRMP forum (which is where this thread belongs anyway), I'll close this one.