5609.10.4 Communication.
FC § 5609.10.4
Special effects materials, articles or devices shall be discharged or otherwise used only when the area wherein the effect is to occur is in clear view of the certificate of fitness holder for such special effects or in the clear view of a trained and knowledgeable assistant who is in direct communication with such certificate of fitness holder. Such communication may be accomplished through the use of lights or other nonverbal signals.













