DOT approval- Any one really know the rules when it comes to, Turn signal lenses Options

[hwgunner]

So, I have a question. Wat are the DOT rules when it comes to NEW turn signal lenses. If an item is DOT approved does it have to say "DOT" on it?? I know that some parts can be DOT approved with out saying DOT on them. An example are the Troutman SS Brake lines. They have a logo that they stamp in the flats of the hose ends and this logo is registerd with the DOT and denotes a product that has passed the DOT testing. Are lenses the same or different? I ask because I got a lens that is suposed to be OEM but does not say DOT on it and does not have the manufacturers name on it. There are a few markings on the lens like a small square w/ an "A" in it and a circle with "E1" in it and a string of numbers I can not remember below that. Like I said this is a NEW lens and is suposed to be OEM. I got a Genuine lens for the other side and it has the manufacturers name on it along with "DOT" and some other marking. The 2 lenses also differ a little in color and in the thickness of the "Black Frame" around the edge. The one without the DOT marks says made in Germany on the box and the onw with the DOT marks says made in the Checz republic. Any ideas?? Sorry for the ramble. (IMG:style_emoticons/default/beerchug.gif)