Originally Posted by joeflyer

Here is AMA's position on the 400 ft. guideline, straight from "Update - UAS Registration FAQ's" on AMA's website.

Q: Am I permitted to fly above 400 feet? What if I had to check a box saying otherwise on the federal registration website?
A: Yes. AMA members who abide by the AMA Safety Code, which permits flights above 400 feet under appropriate circumstances, and are protected by the Special Rule for Model Aircraft under the 2012 FAA Modernization and Reform Act. Checking the box on the federal registration webpage signifies an understanding of the 400 foot guideline. This is an important safety principle that all UAS operators need to be aware of, and is the same guideline established in AC 91-57 published in 1981. However, the placement of this guideline on the FAA website is intended as an educational piece and more specifically intended for those operating outside of AMA’s safety program. We have been in discussions with the FAA about this point and the agency has indicted that it will be updating its website in the next week to make clear that this altitude guideline is not intended to supplant the guidance and safety procedures established in AMA’s safety program.