1997 Buick Regal Owner's Manual - Page 73

Never do this. Here a child is sitting in a seatthat has a lap-shoulder belt, but the shoulderpart is behind the child. If the child wears the belt in this way, in a crash thechild might slide under thebelt. The belt's force would then be applied right on the child's abdomen. That could cause serious or fatal injuries. Wherever the child sits, the lap portion of the belt should be worn low and snug on the hips, just touching the child's thighs. This applies belt force to the child's pelvic bones in a crash. 1-59