- (a) The unique identifier must be maintained in a condition that is legible.
- (b) The unique identifier must be affixed to the small unmanned aircraft by any means necessary to ensure that it will remain affixed for the duration of each operation.
- (c) The unique identifier must be legibly displayed on an external surface of the small unmanned aircraft.
[Doc. No. FAA-2015-7396; Amdt. No. 48-1; 80 FR 78645, Dec. 16, 2015, as amended by Doc. No. FAA-2018-1084, 84 FR 3673, Feb. 13, 2019]