Any permit issued under this chapter may be summarily revoked by the city at any time when, by reason of disaster, public calamity, riot or other emergency or exigent circumstances, the city determines the safety of the public or property requires such immediate revocation. The city may also summarily revoke any permit issued pursuant to this ordinance if the city finds that the permit has been issued based upon false information or when the permittee exceeds the scope of the permit or fails to comply with any condition of the permit. Notice of such action revoking a permit shall be delivered in writing to the event sponsor by personal service or by certified mail at the address specified by the permittee in the application.