New South Wales Consolidated Acts(NTA, secs 19 and 15 (1) (c))
(1) This section applies if the past act is a category B past act that is wholly or partly inconsistent with the continued existence, enjoyment or exercise of the native title rights and interests concerned.
(2) The past act extinguishes the native title to the extent of the inconsistency.
Note: "Category B past act" is defined in sec 230 NTA. This category covers leasehold grants (other than leases that are category A past acts and mining leases).