evidence: Keywords: ashmore and cartier islands | australia: external territory | [...] Ashmore and Cartier Islands came under British control during the 19th century. Under the Ashmore and Cartier Islands Acceptance Act (1933), they became a territory of The Commonwealth of Australia. This act was amended in 1938 to place them under the Northern Territory. [...] The official designation from the Australian government is "Territory of Ashmore and Cartier Islands Adjacent Area" in the Petroleum (Submerged Lands) Act (1967). While petroleum activities are under the control of the Commonwealth of Australia, they are managed under agreement by the Nothern Territory.