scope:

This Standard shall apply to the mounting of portable stage and studio luminaires and accessories mounted overhead in stages, auditoriums, and other places of public assembly, and also in film and video studios. It shall also apply to the mounting of portable effects machines such as fog machines, bubble machines, and other devices and loudspeakers of size and weight similar to that of stage and studio luminaires and normally mounted in a similar manner (e.g., mounted with c-clamps, hook-clamps, or similar luminaire suspension hardware).

This Standard does not apply to permanently mounted architectural luminaires or fixtures, nor does it apply to track lighting luminaires that are both supported and powered by electrical contacts that engage power buses inside a lighting track.