For babies who are less than 20 pounds, the seat must be rear facing; Colorado state law also says that children who are between the ages of one and three years old and who weigh between 20 and 40. Car Seat Laws In Colorado - Mindful Family Medicine Birth to 1 year old and less than 20 lbs: Colorado car seat laws rear facing . They also must be properly secured according to the car seat manufacturer’s instructions. The top rated rear facing car seats of 2017. Moreover, the children should sit in the back seat of your vehicle, not in the front. The official state web portal, children that are less than a year old and weigh less than 20 pounds need to be seated in a rear facing car seat in the back seat of a car. All children should be placed in properly fitting child safety seats, booster sea. A detailed list of the car seat ages and weights enforced in co is provided below: After a child gets too big for the. What do the colorado car seat laws say in terms of car ...