undergo continuous, specialised and further vocational trainings to pass out successfully as a vocationalist. Due to land space limitations on Singapore's territorial land and waters, some specialised training programmes and facilities are located overseas e.g. 130 Squadron in Australia, 150 Squadron in France. Military education Initially, commissioned officers were drawn exclusively from the ranks of Singaporeans who had completed their GCE A levels or embarked on tertiary studies. While the requirements have since been revised, the SAF has still been criticised for "using a promotion system that is based more on education and scholarships than on proven competence". Officers receive their initial leadership training at the tri-service OCS in the SAFTI Military Institute (SAFTI MI). As they progress in their career, they may undergo further formal military education at the SAF Advanced Schools and the Goh Keng Swee Command and Staff College. On the other hand, specialists first receive leadership training at the SCS. Future platoon sergeants and Company Sergeant Majors receive further instruction at the Advanced Specialist Training Wing (ASTW) in SCS. Specialists undergo further education at the SAFWOS Leadership School before receiving their appointments as Warrant Officers. OCS and SCS both have an infantry-based curriculum; special-to-arms training for both officers and WOSPECs is conducted at various training institutes and establishments such as the SAF Medical Training Institute (SMTI), Artillery Institute (AI), Signals Institute (SI), Engineer Training Institute (ETI), Armour Training Institute (ATI), Motorised Infantry Training Institute (MITI), Supply & Transport Centre (STC) and Ordnance Engineering Training Institute (OETI). Pointer is the official journal of the SAF. It is a quarterly publication distributed to all Officers and Warrant Officers, which helps with their ongoing professional education. Foreign defence relations Singapore is part of the Five Power Defence Arrangements, whose other members include the United Kingdom, Australia, New Zealand and Malaysia. Designed to replace the former defence role of the British in Singapore and Malaysia, the arrangement obliges members to consult in the event of external threat against Malaysia and Singapore. To this end, an Integrated Air Defence System is set up in Butterworth, Malaysia involving the stationing of officers from the 5 countries at its headquarters. In 1975, President Chiang Ching-kuo and Prime Minister Lee Kuan Yew signed an agreement code-named “Project Starlight” (星光計畫, also known as Hsing Kuang), wherein Singaporean troops could conduct training exercises in Taiwan. These exercises, engaging as many as 10,000 troops at any one