Opel CORSA Owner's Manual page 52

50 Seats, restraints
Weight and age class
Group II: 15 to 25 kg
or approx. 3 to 7 years
Group III: 22 to 36 kg
or approx. 6 to 12 years
U = Universal suitability in conjunction with three-point seat belt.
X = No child restraint system permitted in this weight class.
On front passenger seat
X
X
On rear outboard seats
U
U
On rear centre seat
U
U