I've looked through these and other forums, searched online. The closest, up to date, reliable source I have found is knowbeforeyoufly.org. The problem is, the statement regarding commercial use is slightly confusing. I have messaged them with no response so far. "If you want to use UAS for a commercial purpose, you have a few options. You can apply for an exemption from the FAA to operate commercially. You can use UAS with an FAA airworthiness certificate and operate pursuant to FAA rules. In both cases you would also need an FAA Certificate of Authorization (COA)." Is this stating that I can apply for a section 333 exemption OR use an FAA airworthiness certificate, or do I need BOTH the exemption AND the airworthiness certificate? I am going to buy an Phantom 3 Professional for my professional photography business soon and want to be able to use it to sell photographs and video for weddings, events, etc.. Flying has always been a passion of mine and so far I've used a CX-10C nanodrone and also a UDI-R/C U818a. If anyone could hep me determine exactly what I need it would be greatly appreciated.