[sgtnoodle]

I'm not familiar with the EU side of things, but I am familiar with the FAA's regulations in the USA.

The FAA hasn't specified an implementation. It's on the manufacturer to come up with a means of compliance, and then get the FAA to sign off on it. There is a standard put out by the ASTM, which is heavily based on an open source project, OpenDroneID.

The standard moved away from NAN in the draft phase, in favor of vendor elements in 802.11 beacon frames. You can choose 802.11 or Bluetooth Low Energy. If you choose 802.11, 2.4ghz is required and 5ghz is recommended. If you choose BLE, v4 is required, and doing v5 as well is recommended.