Before any person, firm, corporation or governmental agency proposes or advertises to create or hold an outdoor mass gathering for entertainment, music, exhibition or other assemblies which will continue for 24 hours or more, the sponsors shall receive the approval of the Department. A Preliminary Notice of Intent shall be submitted at least 90 days before the outdoor mass gathering is to be held and a detailed plan of sanitation and medical care shall be submitted at least 45 days before the outdoor mass gathering is to be held. The sponsors shall be responsible for compliance with these Regulations. Requests for waivers or exceptions to these regulations will be considered on a case-by-case basis and approval will be at the discretion of the Department.