Actually, Karlunity, here in the PRC we are allowed certain SKS's. They can't have the grenade launcher on them, though where we are going to get grenades is beyond me.
As long as they don't have a magazine that is detachable, or holds more than 10 rounds if non detachable, they are okay.
Under the Roberti-Roos section of the assault bill, it specifially states "SKS with detachable magazine". In fact, the CA DOJ website states, "The SKS was originally manufactured with a fixed 10 round magazine. However, modified versions acept a detachable magazine and are assault weapons."
Catagory 2 Assault weapons are bascially AK and AR-15 based weapons.
Then comes the PC 12276 assault weapons. These are based on generic charactoristics.
An assault weapon must first have a detachable magazine:
Then any one of the following:
flash hider, grenade launcher, pistol grip, thumbhole stock, forward pistol grip.
If it has a fixed magazine, it must hold more than 10 rounds.
Or, be shorter than 30"
As far as I can tell, if there is no grenade launcher or it has been deactivated, then an SKS is not an assault weapon.
http://www.ag.ca.gov/firearms/forms/pdf/awguide.pdf