Yard requirements. The requirements for front, rear and side yards in the Special Events Overlay District shall be the same as in the IR District, except that any structures, improvements and uses that have in the past been part of a fair, festival, exhibition, show or other large community gathering shall be considered to be preexisting nonconforming structures, nonconforming buildings and/or nonconforming uses, and if applicable, situated on nonconforming lots, even though any such structure, building or use may have been of a temporary nature installed for a particular event. It is the specific intent of this provision that if setback and yard requirements set forth for the Special Events Overlay District are more restrictive than setbacks and yards utilized for past events, then the yard and setbacks previously utilized for past events shall continue to apply even though temporary structures, buildings and uses may have been disassembled or removed following the conclusion of any such past event.