[bdangubic]

I am not sure if there is a single country now (or there was one ever) where there were any requirements/qualifications needed to be the President

[SenHeng]

https://www.eld.gov.sg/candidate_presidential_qualify.html

> Public sector service requirement

> The public sector service requirement is that the person has: held office for three or more years as Minister, Chief Justice, Speaker of Parliament, Attorney-General, Chairman of the Public Service Commission, Auditor-General, Accountant-General or Permanent Secretary;

> Private sector service requirement

> The private sector service requirement is that the person has: served as the chief executive of a company and the following four criteria are met: