Isofix

It defines standard attachment points to be manufactured into cars, enabling compliant child safety seats to be quickly and safely secured.

The full set of anchor points for this system were required in new cars in the United States starting in September 2002.

[2] However, some child seat manufacturers are beginning to offer true Isofix type attachments in the United States.

[3][4] Isofix is designed to secure a maximum combined weight (comprising both seat and child) of 33 kilograms (73 lb).

[8][9] Under the current UN/ECE R14, all new vehicles produced since February 2013 are required to have Isofix lower anchorages and top tether attachments.