What type of licensing is needed to operate a UAS at community events?
Operations conducted as a Public Aircraft COA (Part 91) are limited to those operations that meet the definition of a Governmental Function (see 49 USC 40125(a)2). If the community event does not meet this definition, the operation must be conducted under 14 CFR Part 107 and any necessary additional waiver or authorizations from the FAA depending on the operation and airspace.
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