Delta Air Lines' new tighter restrictions on emotional support animals and service animals takes effect Thursday.

Atlanta-based Delta put in place the new policy effective March 1 after a passenger on one of its planes was attacked by a 70-pound emotional support dog last year. It also comes amid a rise in incidents involving animals in flights and a lack of certain regulations "creating unsafe conditions across U.S. air travel," according to Delta.

Here's how Delta describes its new policy: