The way I read it is that the law says you cannot carry in a vehicle without CPL, and since they go by definition of vehicle "A vehicle (from Latin: vehiculum [1] ) is a mobile machine that is designed or used to transport people or cargo. Most often vehicles are manufactured, such as bicycles, cars, motorcycles, trains, ships, boats, and aircraft. "
BUT
There are definitions that say a vehicle is a self propelled object used for transporting people and objects. So by that definition a bike is not a vehicle since you are propelling it. But I feel the law is going to go with the first haha.