If a foreign visitor fails or refuses the tests, they may face charges under the Infectious Diseases Act.
Authorities say that if someone tests positive after landing into Singapore, they will be issued a stay-home notice to be quarantined in a dedicated facility.
Under the new travel order, a person must be fully vaccinated for two weeks after they have received both doses of either Pfizer, Moderna or other vaccines listed under the World Health Organisation (WHO) emergency use list, such as Sinovac and AstraZeneca.
In June, as one of the world’s most successful countries at combating Covid-19, Singapore said it would make major changes to the way it managed the pandemic.