What was the case about exactly?
This specific test case concerned insurance policyholders who held cover for "business interruption" losses arising from an outbreak of infectious disease with a 20km radius of the insured premises, but which excluded "diseases declared to be quarantinable diseases under the Quarantine Act 1908 and subsequent amendments".
The insurance policies in the test case mistakenly referred to the Quarantine Act 1908, which was repealed in 2015, and replaced with the Biosecurity Act 2015.
The insurers have claimed this was clearly an error, and the intention of the policy was obviously to exclude a pandemic under any future legislation. They argue the phrase "subsequent amendments" referred to any future legislation, not just amendments to the specific Quarantine Act 1908.
But the NSW court of appeal disagrees, deciding that the policy in question only protected insurers under the Quarantine Act 1908, and the phrase "and subsequent amendments" referred to amendments to that act only.