the brunei national dollar (bnd) is pegged at the same value to which currency
Brunei dollar Under a Currency Interchangeability Agreement in 1967, the Brunei dollar is interchangeable with the Singapore dollar at par. As such, the Brunei dollar is accepted in Singapore as "customary tender"; likewise, the Singapore dollar is accepted for payments in Brunei.[1]
Australian dollar The Australian dollar (sign: $; code: AUD) is the currency of the Commonwealth of Australia, including its external territories Christmas Island, Cocos (Keeling) Islands, and Norfolk Island, as well as the independent Pacific Island states of Kiribati, Nauru, Papua New Guinea, Tonga, Tuvalu, and Vanuatu. Within Australia, it is almost always abbreviated with the dollar sign ($), with A$ or AU$ sometimes used to distinguish it from other dollar-denominated currencies.[2][3] It is subdivided into 100 cents.