Don't play play. PAB enforcement will start on February 2018
In case you haven't notice, Singapore LTA has announced on its website and on One-Motoring websites that enforcement for PAB (power assist bicycle) or ebike will start on February 2018. After such, anyone caught keeping or using unregistered PAB are liable for fine up to $10,000, jail or both.
Now till February 2018 is a grace period for any PAB owner to register and to have the PAB officially sealed.