Any person who enters someone else's property without being authorized and deliberately does so to disrupt the property owner's rights is trespassing, and guilty of violating the California Trespassing Law California Penal Code 602. Therefore, Californians must turn to signs specially designed to enforce state rules by imprinting its law. Composed of heavy-duty aluminum that lasts for decades outdoors, these signs stay strong throughout all weather. The signs are imprinted with 3M ink and withstand abrasion and water. The code states that the signs must be posted at no greater than three miles at all entry roads and trails. For more questions, dial our Live Help hotline above.