As used in this chapter, unless the context requires otherwise:
An agent, occupant, lessee, contract purchaser, or person other than the owner, having possession or control of property.
All assemblies of people for the purpose of public amusement reasonably anticipated to number more than 250 for a continuous period of six hours or more, more than 10% of whom will assemble outdoors or in structures specially constructed, erected or assembled for the gathering, whether or not an admission fee is charged.
Any natural person, association, partnership, firm, corporation, joint venture, or any other legal entity whatsoever, who initiates, organizes, promotes, permits, conducts or causes to be advertised a public gathering.