When does Maryland allow children to ride in the front seat of a vehicle?

When does Maryland allow children to ride in the front seat of a vehicle?
Maryland does not impose any restrictions on children in the front seat, with the exception being rear facing infant seats. However, the best interests of the child may be best suited in a seat which will protect them from the dangers of an adult sized lap and shoulder belt - a belt which goes across an adult's shoulders could be at an angle which would severely injure a child (think decapitation) in a collision.

Here's a synopsis of the current MD law:

 Transportation Article 22-412.2 (Child Restraints) Maryland's current law (effective June 30, 2008) requires that children under eight years old to ride in an appropriate child restraint,* unless the child is 4'9" or taller or weighs more than 65 pounds.