As a counterpoint, in the UK: - Under 7kg you must be able to see it well enough to avoid collisions with stuff - Between 7-20kg stick below 400ft - Above 20

As a counterpoint, in the UK: - Under 7kg you must be able to see it well enough to avoid collisions with stuff - Between 7-20kg stick below 400ft - Above 20kg it's more complex; everything else applies to <20kg aircraft - If you're flying aircraft for money, you need to apply to the CAA for a permit and demonstrate competency - You may be allowed to fly higher or further away as a commercial operator if you can put together a safety case - There are procedures for blocking off sections of airspace for flying BVLOS (Beyond Visual Line of Sight) with CAA permission - You are very unlikely to get permission to routinely fly outside visual range pending the development of reliable sense and avoid systems I personally think this makes a lot of sense; the majority of business operators & hobbyists seem to get on with things without causing much risk to manned aviation. There were over 300 licensed small UAS operators at last count. http://www.caa.co.uk/docs/33/cap722.pdf http://www.caa.co.uk/docs/33/cap722.pdf