High-Key (HK) NS Training for Overseas Singaporeans Manage your National Service obligations with clarity. For Singaporeans residing overseas, a High-Key (HK) advance course overseas Singapore refers to mandatory In-Camp Training (ICT) or refresher courses lasting 7 days or more. In 2026, NSmen living abroad must apply for a valid Exit Permit to remain overseas. If you are called up ... https://suitssecurity.com/hk-advance-courseoverseas/