The Cayman Islands Traffic Regulations 2012 states that any child travelling in a motor vehicle must wear a seatbelt or, for those under two, be seated in a car seat attached by a seatbelt.
It also states that a rear facing child’s car seat must not be fitted in a seat with a front airbag. Children’s car seats can be bought at The Baby Shoppe. Ecay Trade also has second hand options.