They don't so much define commerciality as they define what doesn't qualify for a hobby use exemption to the rules. Here's their rules for model aircraft, with

They don't so much define commerciality as they define what doesn't qualify for a hobby use exemption to the rules. Here's their rules for model aircraft, with a section on what does and doesn't count as hobby use. http://www.faa.gov/uas/media/model_aircraft_spec_rule.pdf http://www.faa.gov/uas/media/model_aircraft_spec_rule.pdf