The appellant was a party to a re-insurance agreement in respect of any property which it insured for over $150,000. That agreement, according to Mr Colquhoun and another witness for the appellant, determined which classes of buildings would be accepted for re-insurance above that amount and at what rate. A document described as the second defendant's 1986 risk classification, which formed part of that agreement, was in evidence. In that document shopping centres were divided into four classes: modern massive sprinklered, massive sprinklered, massive non-sprinklered, and others. Increasing rates of premium were provided from the first to the third and the fourth category was required to be declined. Similarly, arcades were divided into three categories; massive sprinklered, massive non-sprinklered, and others. Massive non-sprinklered could be accepted at a higher premium than massive sprinklered; "others" were required to be declined. The term "massive construction" was defined to mean, relevantly, all external walls entirely of brick, concrete block, concrete or reinforced concrete with floors of concrete and roofs of tile, iron or steel on iron or steel frame set in concrete. Whether the subject building was properly described as a shopping centre or an arcade, the appellant would have been obliged to decline to insure the subject building if it had known of its wooden walls or its wooden roof trusses or its wooden floor, or accept the risk of losing its re-insurance for that risk.