Drone pilots in the United Kingdom have until the end of November to register themselves and their quadcopters with the Civil Aviation Authority - or face a £1,000 fine.
Owners of drones weighing more than 250g (8.8oz) are covered by the rules - which also require owners to pass an online theory test.
Registrants will be given a unique ID which must be displayed on their devices.
Registering a drone and receiving a licence can be done online via a multiple choice questionnaire at the cost of £9. United Kingdom drone owners have until 30 November to register or they can face a fine of as much as $1290, according to one report. There's no limit on how many times the test can be taken.
Anyone with a drone that fits into this category has until 30 November to comply with the new requirements, but there are exceptions.
Department store John Lewis stopped selling drones in May because of the chaos they are causing at airports.
It's trying to avoid a repeat of last year's Christmas drone incident that stalled flights at Gatwick Airport. In January, flights were also briefly halted at Heathrow airport after another unidentified drone sighting.
UK Airprox Board figures show there were 125 near-misses between drones and aircraft reported in 2018, up by more than a third from 93 the previous year.
"Registration will do nothing to improve safety or security because bad actors will not register their drones", he said.
The registration system is a way to connect drones to their owners, both to return drones which get lost and to ensure that operators are flying their drones responsibly. "Our aim is for the Drones Reunited platform to become an essential service for the drone community - the first port of call for anyone who has lost, or found, a drone".
"The service is about giving something back to the community, helping responsible drone owners and operators to be reunited with lost drones and continue flying", said Jonathan Nicholson, Assistant Director of Communications at the UK Civil Aviation Authority in a press release.
Registration of drones will cost 9 pounds (11.6 US dollars) a year and also give access to the Drones Reunited platform which is a new scheme also launched Tuesday.