(a) Notwithstanding the provisions of Sections 11473, 11473.5, and 11479, at any time after seizure by a law enforcement agency and identification by a forensic chemist or criminalist of phencyclidine, or an analog thereof, that amount in excess of one gram of a crystalline substance containing phencyclidine or its analog, 10 milliliters of a liquid substance containing phencyclidine or its analog, two grams of plant material containing phencyclidine or its analog, or five hand-rolled cigarettes treated with phencyclidine or its analog, may be destroyed without a court order by the chief of the law enforcement agency or a designated subordinate. Destruction shall not take place pursuant to this section until all of the following requirements are satisfied:

1. (1) At least one gram of a crystalline substance containing phencyclidine or its analog, 10 milliliters of a liquid substance containing phencyclidine or its analog, two grams of plant material containing phencyclidine or its analog, or five hand-rolled cigarettes treated with phencyclidine or its analog have been taken as samples from the phencyclidine or analog to be destroyed.
2. (2) Photographs have been taken which reasonably demonstrate the total amount of phencyclidine or its analog to be destroyed.
3. (3) The gross weight of the phencyclidine or its analog has been determined by actually weighing the phencyclidine or analog.