time, provided officers a chance to simulate wartime conditions more closely and gain experience in the command and control of operations involving several battalions. Singapore has consistently supported a strong US military presence in the Asia-Pacific region. In 1990, the US and Singapore signed a memorandum of understanding (MOU) which allows the US access to Singapore facilities at Paya Lebar Air Base and the Sembawang wharves. Under the MOU, a US Navy logistics unit was established in Singapore in 1992; US fighter aircraft deploy periodically to Singapore for exercises, and a number of US military vessels visit Singapore. The US Navy's Task Force 73/Commander, Logistics Group Western Pacific is now located at Sembawang. The MOU was amended in 1999 to permit US naval vessels to berth at Changi Naval Base, which was completed in early 2001. Singapore's defence resources have also been used for international humanitarian aid missions. They included United Nations peacekeeping missions in areas such as Kosovo, Kuwait and East Timor, participation in the Multi-National Force – Iraq, sending military equipment and personnel to assist in the humanitarian rescue and relief efforts in Indonesia after the 2004 Indian Ocean earthquake and tsunami, and the United States after Hurricane Katrina, sending medical supplies and personnel in response to the earthquake in Nepal and establishing medical and dental assets for use by the Afghan people. The Republic of Singapore Navy contributes to anti-piracy efforts in the Gulf of Aden off the eastern coast of Somalia as part of the 25 nations coalition Combined Maritime Forces. Several of the SAF's top officers have thus overseas operational military experience. Singapore was the only Asian country to contribute assets and personnel to the Global Coalition to Defeat ISIS and had participated in Operation Gallant Phoenix since May 2017. Many of the Singapore's air units are located abroad such as: No. 130 Squadron in Australia, No. 150 Squadron in France, or joint USAF-RSAF 425th and 428th Fighter Squadron. Since 2009, up to 90 soldiers annually are sent to Germany for exercises of a maximum of seven weeks each time at the Bergen-Hohne Training Area and other locations. Legislation Under the Singapore Armed Forces Act, the president of Singapore has the authority to raise and maintain the SAF. The president also has the power to form, disband or amalgamate units within the SAF. The Armed Forces Council (AFC) administers matters relating to the SAF under