The EID is a joke. The owner just has to certify that over the previous x number of months, OR the time that the owner has had the horse (which could be as little as a few days) the horse hasn’t received any drugs, to the best of owner’s knowledge. That’s it. It’s one of the most meaningless things I’ve ever seen.
That said, from what I understood the EIDs were the first part of a process though, which was going to be getting tightened up over the next several years, so there may be some changes coming.