Cal. Penal Code - PEN § 32750. Section 32750.
(a)
It shall be a public nuisance to possess any machinegun in violation of this chapter.
(b)
The Attorney General, any district attorney, or any city attorney may bring an action before the superior court to enjoin the possession of any machinegun in violation of this chapter.
(c)
Any machinegun found to be in violation of this chapter shall be surrendered to the Department of Justice. The department shall destroy the machinegun so as to render it unusable and unrepairable as a machinegun, except upon the filing of a certificate with the department by a judge or district attorney stating that the preservation of the machinegun is
necessary to serve the ends of justice.