The storage of paints is allowed, but it is warranted that otherwise during the currency of this policy no mineral oil or other liquid giving off an inflammable vapour flashing below 200 degree F or 93 degree C or more than 400 gallons of kerosene oil or other inflammable vapour but flashing below 100 degree F or 38 degree C (stored in accordance with the municipal regulations) and not more than 4 cases or 4 cartons of matches and/or 4 cases of fire crackers be in or on the premises.