Three candidates were nominated Tuesday to run in Singapore's first contested presidential vote in more than a decade next week, officials said.
While the role is largely ceremonial, there are stringent requirements for the position, which formally oversees the city's financial reserves and holds the power to veto certain measures and approve anti-graft probes.
Incumbent Halimah Yacob ran unopposed for her six-year term in 2017.
Election officials announced the final list of candidates for the September 1 vote after a formal nomination process on Tuesday.
Former senior minister, deputy prime minister and central bank chief Tharman Shanmugaratnam, 66, is seen as the frontrunner.
He resigned from the ruling People's Action Party (PAP) ahead of his bid for the non-partisan position.
Another candidate to qualify is Ng Kok Song, 75, who previously served as chief investment officer at GIC, one of the world's biggest sovereign wealth funds, which manages Singapore's foreign reserves.
Rounding out the field is businessman Tan Kin Lian, 75, former chief executive of local insurance giant NTUC Income, who previously lost a presidential run in 2011.
Singapore requires presidential candidates to have served either as a senior civil servant or the chief executive of a company with shareholder equity of at least Sg$500 million ($370 million).
The affluent city-state's government is run by the prime minister, currently, Lee Hsien Loong, while the president serves as head of state and must belong to no political party.
The president can veto appointments to key public offices and authorise corruption investigations even if the prime minister has declined to do so, though this has been rare in practice.
Perhaps most crucially, they also serve as a custodian of Singapore's reserves, which can only be drawn upon in exceptional circumstances, such as the Covid-19 pandemic and the 2009 global financial crisis.
The government does not disclose how large the reserves are to protect national interests and prevent speculative attacks on the Singapore dollar.
"It's enough for most circumstances. It's enough to give us substantial support in the budget every year," Premier Lee said in a recent interview when asked about the size of the reserves.
