PABs must be type-approved, sealed and registered before they can be used on public roads and cycling paths in Singapore.
Only PABs that meet all the technical requirements can be registered.
To register or ride a PAB, you must be at least 16 years old. You must also wear protective gear when riding a PAB.

https://onemotoring.lta.gov.sg/content/onemotoring/home/buying/vehicle-types-and-registrations/PAB.html

https://onemotoring.lta.gov.sg/content/onemotoring/home/buying/vehicle-types-and-registrations/PAB.html#technical_requirements