Information on the CA knife law has new section numbers from the one posted on your website.
Knife Carrying Law
California Penal Code section 16470.
As used in this part, "dirk" or "dagger" means a knife or
other instrument with or without a handguard that is capable of ready
use as a stabbing weapon that may inflict great bodily injury or
death. A nonlocking folding knife, a folding knife that is not
prohibited by Section 21510, or a pocketknife is capable of ready use
as a stabbing weapon that may inflict great bodily injury or death
only if the blade of the knife is exposed and locked into position.
Good summary of section changes at this website: