You do not need a license (or registration, insurance) to ride an Electric Bicycle that is certified by ARAI as a non-motor vehicle. In order for an electric bicycle to be certified by ARAI, it needs to meet certain criteria such as a Max speed of 25Kmph (in electric mode) and <250W power output. So if you are looking to buy an electric bicycle that can ride without a license, then do make sure it is ARAI certified as a non-motor vehicle.