Con-Stan Industries of Australia P/L v Norwich Winterthur Insurance (Australia) P/L (1986) 160 CLR 226

This case considered the implied terms in a contract and specifically in relation to terms implied into a contract by custom or usage.  The central issue was whether it was custom for an insured broker to be solely responsible for payment of insurance premiums to an insurance company and whether this custom which was practiced in the maritime industry also applied to non-maritime industries.