Penal Code Section 150
Hiring, or conniving at hiring, of persons to join an unlawful assembly
150. Whoever hires or engages or employs, or promotes or connives at the hiring, engagement, or employment of any person to join or become a member of any unlawful assembly shall be punishable as a member of such unlawful assembly, and for any offence which may be committed by any such person as a member of such unlawful assembly, in pursuance of such hiring, engagement, or employment, in the same manner as if he had been a member of such unlawful assembly, or himself had committed such offence.
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