This Code does not pro­hib­it the assem­bling, com­pound­ing, use and dis­play of spe­cial effects of what­ev­er nature by any per­son engaged in the pro­duc­tion of motion pic­tures, radio, or tele­vi­sion pro­duc­tions, the­atri­cals or operas when such use and dis­play is a nec­es­sary part of the pro­duc­tion and such per­son pos­sess­es a valid per­mit issued by the Coun­ty in accor­dance with Sec­tions 7–5‑7 and 7–5‑8 of this Code.