H.F.
There are some belt postioning boosters that are okay for kids 30 pounds nad up. We have two oler Britax boosters and the belt positioning ones do have a clip that holds the seat belt down. CHeck the weight requirements. Most belt positioning boosters do need a lap and shoulder belt however. I checked California law thoroughly to see what it specifically says and it simply states that children under 6 or under 60 pounds need to be in an apropriate child restraint and that children under 12 may not sit in the front seat of the car unless all back seats are occupied by children under 12 or a carseat cannot be safely used in the back seat. I checked this because my 20 month old is not yet 20 pounds and I really want to turn her carseat around. However there are no carseats that state that they are safe forward facing for a child under 20 pounds os I'm out of luck.