if this piece of equipment, whatever it is -- like this wonderful new connector -- is used -- >> cupeling. >> excuse me. is used in accordance with the following specific requirement, it will meet the requirements of the following. in other words, the listing says if you do it the right way, we can assure that you this will meet some standards. right? is that more or less correct? >> correct >> and the third part of that -- we have testing, listing. and then the third part is approval. and approval is something that's done at the local level here at the city of san francisco. we typically approve a listed product. like this kupling. occasionally we have somebody come forward saying, look, i have the listing. we say, that's great. but we don't allow to you use it here in san francisco. either the local law doesn't allow that kind of product or that kind of material, or we don't think it's safe. and i could give you some examples of that but basically 99% of the time we approve a list of products which has been tested, listed, and then approved by david or me. basically it's on behalf of th