The concept of a Regional Safety and Security Organization (RSOO) for the Pacific was born on 7 August 2004 when PICASST was signed. The original four signatories were Kiribati, Papua New Guinea, Samoa and Vanuatu.
PASO, as an organisation, was created in 2007. The Asian Development Bank (ADB) provided a loan of 1.6M AUD to support the establishment of PASO. The Pacific countries of Kiribati, Papua New Guinea, Samoa and Vanuatu act as guarantors to the ADB on behalf of all PASO Members.
The main objectives for the PICASST and the initial ADB support was to set up an international organisation that could foster harmonization of regulatory frameworks of Pacific Member countries, ensure airline compliance with international standards, and establish a regional surveillance and inspection system.