As used in this chapter, the following terms shall have the meanings indicated:
An organized procession containing 25 or more vehicles, except funeral processions, upon any public street, sidewalk or alley.
Any march or procession consisting of people, animals or vehicles, or combination thereof, except funeral processions, upon any public street, sidewalk or alley, which does not comply with normal and usual traffic regulations or controls.
The holding of any meeting of persons in such numbers which, if not controlled or regulated, can reasonably be expected to interfere with the use of public property by others. A public gathering or assemblage of 25 or more persons shall constitute a presumption that such meeting will or can be expected to interfere with the use of public property by others.