Regardless, like the recent moped law, the issue is not that it cannot be enforced, the issue is it will "not" be enforced.  Please check the minutes of the January Neighborhood Board 5...(Chairman West)..." HPD will not use a lack of license plate or registration stickers as a reason to stop mopeds but will check registration and licensing on mopeds during other stops."  ??? Please access the minutes to insure this was not taken out of context.  Hence, the almost continual buzzing of mopeds up and down Waialae Avenue and the mopeds you still see on the streets without a license.  Thanks to the moped owners who complied.  :)