When a student is suspended by a teacher, principal, or superintendent, pursuant to section 282.4, the student may be readmitted by the teacher, principal, or superintendent when the conditions of the suspension have been met, but when expelled by the board the student may be readmitted only by the board or in the manner prescribed by the board.
94 Acts, ch 1091, §23; 95 Acts, ch 218, §28; 96 Acts, ch 1215, §52