At every event with a defined start time, where an assembly occupancy can accommodate 300 occupants or more, the event manager, operator, sponsor, or a designee shall make an audio announcement to all occupants, prior to the commencement of the event, regarding the following:
Such events include but are not limited to those held at armories, assembly halls, auditoriums, dance halls, exhibition halls, gymnasiums, special amusement buildings regardless of occupant load, and theaters.
16- 219 C.M.R. ch. 20, § 7