Ford 2006 Expedition Owner's Manual page 199

6. Tighten the child safety seat tether strap according to the
manufacturer's instructions.
If the safety seat is not anchored properly, the risk of a child
being injured in a collision greatly increases.
Attaching safety seats with LATCH (Lower Anchors and Tethers for
Children) attachments for child seat anchors
Some child safety seats have two rigid or webbing mounted attachments
that connect to two anchors at certain seating positions in your vehicle.
This type of child seat eliminates the need to use seat belts to attach the
child seat. For forward-facing child seats, the tether strap must also be
attached to the proper tether anchor. See Attaching safety seats with
tether straps in this chapter.
Your vehicle has LATCH anchors for child seat installation at the seating
positions marked with the child seat symbol:
Never attach two LATCH child safety seats to the same anchor.
In a crash, one anchor may not be strong enough to hold two
child safety seat attachments and may break, causing serious injury or
death.
2006 Expedition (exd)
Owners Guide (post-2002-fmt)
USA (fus)
Seating and Safety Restraints
199