I'm glad necromitus noticed you were in another country, 'cuz I was getting gready to say that blue is HIGHLY subjective to the police officer you encounter. Nobody can say anything if you're sitting in a parking lot, but riding down the road with them is another story. Flashing blue will get you a definite ticket, possibly a warning the first time if you're lucky. A constant blue light I've heard of people being given a hard time, but if you really wanted the hassle you could probably fight it in court. I guess FYI for you, but some good info for those stateside... The only reason I know this is because my friend installs them on Harleys for a living. Different states may have slightly different laws though...