Never do this.; Here two children are wearing the same belt. ; The belt can’t properly spread the impact forces.- Page 67

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CAUTION:

Never do this.

Here two children are wearing the same belt. 
The belt can’t properly spread the impact forces.
In a crash, the two children can be crushed
together and seriously injured. A belt must be
used by only one person at a time.

Q:

What if a child is wearing a lap

-

shoulder belt,

but the child is so small that the shoulder belt is
very close to the child’s face or neck?

A:

Move the child toward the center of the vehicle, but
be sure that the shoulder belt still is on the child’s
shoulder, so that in a crash the child’s upper body
would have the restraint that belts provide. If the
child is sitting in a rear seat outside position, see
“Rear Safety Belt Comfort Guides” in the Index. 
If the child is so small that the shoulder belt is still
very close to the child’s face or neck, you might
want to place the child in the center seat position,
the one that has only a lap belt.