I registered the first day no problems have my card on me and I used a dyno tape maker put the FAA number on both sides of my rudder under my AMA number worked well ,a friend of mine is a capt in the sheriffs dept I talked to him and he told me they are to be enforcing this law if you fly at other than a AMA field they will check you , they can check anytime after dec 21 because of the first time fliers that get them for Christmas , I am glad I am registered it is peace of mind , and is the law !!!