Read the following passage and answer if the question is true or false.
Passage: In Virginia, headlight flashing to warn of police activity is not against the law; however radar detectors remain outlawed. Virginia motor vehicle code specifies an ``audible or light signal'' to indicate overtaken vehicles should yield in certain situations

Question: is it illegal to flash your headlights to warn of police in virginia?

Is the answer True or False? Respond with only "True" or "False" and no additional text.
True (but with a caveat: it's not explicitly stated as illegal, but it's also not explicitly stated as legal, so it