I don't know of ANY who are not waiting. They have a bunch of paperwork they file then the Feds look at it and determine if the vehicle meets the standards, if the Dealer meets the standards, if the Salvage yard the car will be sent to meets the standards . Then they cut the voucher for the dealers.
Many dealers have gotten an exemption under the latest ruling that lets them keep the car as is UNTIL they get the voucher. That way if one part of the chain fails they can auction the car off as used instead of scrapping it. If they get the voucher then they scrap it.