Is it pedal-assist? If so, slightly lighter penalty (a drunk person on a cycle can cause a lot of collateral damage if, for example, they cause a car to swerve).

Does it have a throttle of any kind that does not require peddling? That's a motorbike and should be plated, registered, licensed, and insured as one and only allowed where motorbikes are allowed. Driving while drunk should be treated the same as any other road vehicle.