The article is sorta okay on that point, Ronnie. It says FAA limits altitude to 400' and no mention of AMA which has no established limit outside the 3 mile airport proximity. It isn't a model airplane but rather a regulated UAS according to FAA (and AMA) - the article seems to go a bit astray on that point, and also there is apparently a presumption on the part of the operator that it is - as it seems he has cited an FAA limit that only applies to model airplanes. FAA hasn't set an altitude limit on regulated sUAS yet, nor has it authorized them to fly at all (except by waiver/COA). Maybe a moot point though, as it appears intended to fly outside of the National Airspace.

Abel