Graco Nautilus Owner's Manual page 27

Use vehicle belt (not UAS connectors) for installations with children weighing more than
21.7 kg (48 lbs).
NOTE : Some vehicle manufacturers have lower maximum weight ratings for UAS anchors,
so you must consult your vehicle owner's manual or call the vehicle manufacturer to confirm
the limits on your vehicle's UAS anchors.
See your vehicle
owner's manual for
exact locations, anchor
identification, and
requirements for use
with a child restraint.
Vehicle
Seat Crease
Vehicle Lower
Anchor Points
27
Vehicle Top Tether
Anchor Points
Typical seat in a
passenger vehicle. Other
vehicle types may have
different UAS locations.