As used in this part, “undetectable knife” means any knife or other instrument, with or without a handguard, that satisfies all of the following requirements:

(a) It is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.

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(b) It is commercially manufactured to be used as a weapon.

(c) It is not detectable by a metal detector or magnetometer, either handheld or otherwise, which is set at standard calibration.

(Added by Stats. 2010, Ch. 711, Sec. 6. (SB 1080) Effective January 1, 2011. Operative January 1, 2012, by Sec. 10 of Ch. 711.)