(a) No person shall operate a motor vehicle in excess of twenty-five miles per hour (25 m.p.h.) when passing a school building or school zone during school hours when children are present and outside the building.
(b) This speed limit shall not be applicable upon the freeways and interstate highways of this state or to school zones adequately protected by a steel fence limiting access to and egress from safety crossings.
Acts 1977, No. 229, § 1; A.S.A. 1947, § 75-601.5.