The president is directly elected by popular vote for a renewable six-year term. Requirements for this position are extremely stringent, such that no more than several thousand people qualify for candidacy. To be qualified, a candidate needs to be a person at least 45 years of age who is no longer a member of a political party, to have held office for at least 3 years in a number of specific public service roles, to also have 3 years experience as chief executive of a private sector company with rules limiting which roles and companies qualify, and more. The Constitution requires that presidential elections be "reserved" for a racial community if no one from that ethnic group has been elected to the presidency in the five most recent terms. Only members of that community may qualify as candidates in a reserved presidential election. In the 2017 presidential election, this combination of stringent requirements and a reserved election that required the candidate to be of the 13% Malay ethnic group led to a single person being qualified for the office; Halimah Yacob won in an uncontested election.