When Singapore became an independent nation-state in 1965, the President carried out mainly ceremonial and community duties. The 1990 Constitutional Amendment enlarged the President's powers to include a constitutional duty to safeguard national reserves and the integrity of the public service. Instead of being appointed by Parliament, the President was to be elected by popular vote. Today, the elected presidency is a 32-year-old institution and is still evolving. The Role of Singapore's Elected President offers a glimpse at the beginnings of the office of the elected presidency and tracks the legacy and defining moments of Singapore's elected presidents. 要拿出国家储备金，必须动用两把钥匙，一把由总理和内阁保管，一把由总统保管。新加坡自建国以来，就有总统。1965年8月9号，尤索夫伊萨成了新加坡独立后的第一任总统。新加坡第一次提出民选总统的概念，是在1984年。新加坡民选总统制度历经30年，它有哪些改变，又带来了什么样的影响？