OK you guys have made it clear, the Norfolk Island Species at Risk
stamp in the Australia Souvenir Sheet stamp cannot be used in
Australia. Aussie Post sold a worthless stamp as far as the continent
is concerned.
There is another recent Souvenir Sheet with one Pitcairn Island $2.50
stamp and a Vanuatu 150 stamp. Due to the difference in face value of
the stamps I would think these stamps are to be used in their own
country.
1994 Italy and San Marino Souvenir Sheet. One stamp for Italy, one
stamp for San Marino. Each stamp valid only in the country indicated.

Ralph