I'm really not current in this, but....
when I had my inspectors license it was "no larger than a quarter ($0.25 piece) in the windshield wiper area. Outside the wiper area, unlimited.
I have had four stone chips in my '94 Dodge Caravan for years that have never been an inspection issue. Two are about the size of a quarter in the wiper area. One is larger but o/s the wiper area. The same shop has inspected this vehicle since it was new. I have never discussed it with the shop.
My insurance will pay 100% for repair of a stone chip using some sort of expoxy. Replacement comes under Comprehensive which I carry $100 deductible since the premium is only a couple dollars more than $500 deductible.
One could ask, why I have never had these stone chips repaired? I can't tell you except I just don't want to spend any time on it.
Hope this helps!
Sort of like not wanting to spend any time on CPF's (Sorry for the whine, but I had to do it ;D).