Hi, Barney. Yes, they are required. They seem keen on making sure that us experimental guys have our stage 2 op limits.
Yes, they will see your plane on the ramp one day and ask for them. I picked up a passenger at Hayward (HWD) to go to Reno (RNO) and had to show them to the FAA inspector, who was actually checking out some planes in another area. He saw my EZ and decided to check me out. The first thing he asked was if I had my stage 2 operating limitations, then proceeded to check out the rest of the plane. He was actually a decent guy and helpful, but he COULD have been a real pain. Fortunately for me and my passenger, he wasn't. If you don't have your operating limitations, your plane is considered unairworthy and therefore would/ could be grounded until you get them.
Regards
Harry Thomas
Long EZ N 104EZ, Chino (CNO) - aka, Canard Central. Yes, I am going to Flo's tomorrow for breakfast!!