Starting on Dec. 18, passengers traveling on Delta will no longer be able to bring support or service animals under four months old on flights.
The new changes will also include a ban on emotional support animals on flights that are longer than eight hours.
According to representatives from the airline, the changes come after an 84-percent increase in reported incidents that involved service and support animals between 2016 and 2017. Reported incidents have included cases of urination or defecation and at times, cases of biting and attacks on passengers.
Customers who have already bought tickets past Dec. 18 and had requested to bring a service animal will still be able to do so up until Feb. 1. Passengers will no longer be able to bring emotional support animals on flights longer than eight hours on or after Feb. 1, and will be contacted by Delta’s Reservations and Customer Care team to adjust reservations if the policy update will affect their trip.
Delta first announced it would be tightening its rules on service and emotional support animals earlier this year.
The new policies have been set to align with the eight-hour time frame mentioned by the U.S. Department of Transportation’s Air Carrier Access Act and age limits set for vaccination as recommended by the Centers for Disease Control and Prevention.