California Code, Fish and Game Code - FGC § 8631

In lieu of a physical seizure pursuant to this article, any person authorized to make an arrest for a violation of any provision of this code, may attach to any net used for taking fish in violation of this code a tag of metal or other material, which shall be adopted by the department for this purpose and furnished to such person. The tag shall be impressed or printed with language stating that the net to which it is attached is thereby seized by the department as a public nuisance. The act of attaching such tag shall be a seizure within the meaning of this section.

Removal of a tag attached to any net pursuant to this section by any person other than a person authorized by the department, or the use of any such net by any person for fishing purposes, unless authorized by the department or by the superior court, is a misdemeanor.