I live in Sandy Eggo KA, and I have been following this law since its inception. I order my range ammunition from Mastercast, a topnotch reloading outfit. If the rain hurts the rhubarb, come February next, I will have to have it sent to my range/gunstore. I will then be fingerprinted and background checked each time I get a shipment. Oh yeah, and pay a $25 fee for the fingerprinting and background check.
The Los Angeles politician who introduced the bill that resulted in the law (AS962 if memory serves) has done so every legislative session for the last several years by my observation. Something of a single issue fellow. Well, he got it approved and signed. And yes, it becomes law in February.
Except . . . in federal courts there are two lawsuits active to stop AS962 in its tracks, and one of them has the NRA as a plaintiff. The primary legal precedent in the recent Supreme Court decisions that the Second Amendment applies to individuals, not to militia. But the real pivot is "interstate commerce", which federal court decisions over decades has come to mean just about anything that goes from one state to another. AS962 is intended to restrict interstate commerce into California. At some point before February next, I would expect one of the federal judges involved to stick AS962 into his frig while things get sorted out as to who governs interstate commerce, and who cannot.
Cordially, Jack