What a shame although it's not limited to California. Even here in the north central states and the east we are coming under increasing regulations and costly health inspections requirements. However as far as I know only Minnesota requires stocking permits for private ponds.
Here's an overview of health inspections required and hauling regulations out here in the Midwest and east. After VHS showed up things got much worse as the feds got into their "kneejerk" reaction mode.
http://www.ncrac.org/Info/StateImportRegs/stateregsmain.htm The only saving grace I see for California pondowners is there won't be any money for state employees to do any enforcing, inspecting etc. soon. California is rapidly going in to default from what I'm seeing. Minimum wage now for state employees? Is that true?