Is it illegal to relocate plate number from centre to side?

Hi Risman Eis! Vehicle licence plates must be prominently displayed at the front and back of all vehicles, so that vehicles can be easily identified for regulation, enforcement, and emergency purposes. Check more details here: https://onemotoring.lta.gov.sg/content/onemotoring/home/buying/vehicle-types-and-registrations/car/standard_registration.html