California Code, Fish and Game Code - FGC § 8635

(a) Notwithstanding Section 8633, any net or trap seized pursuant to Section 8630 as illegal because of its size, manner of construction, materials used in its construction, or configuration of its parts is presumed to be contraband and shall not be returned pending forfeiture unless it can be and is modified to eliminate the condition of illegality. This subdivision does not apply to any net or trap seized pursuant to Section 8630 for illegal use.

(b) Notwithstanding subdivision (a), any net or trap seized pursuant to Section 8630 that is needed for evidence may be held for evidence.