For the purpose of this endorsement an act of Civil Commotion, which defined as an act of a large number of people acting together disrupting public peace and disturbance tumultuously with violence and a chain of destruction of a large number of properties, indicated by the cessation of more than one half of the normal activity of commercial / shopping or business areas or schools or public transportation in one city for at least 24 hours(twenty-four) hours consecutively commencing immediately before, during or after the event.