The Secretary shall require that each pest control consultant, pest control applicator, or public agency applicator receive additional training prepared and administered by the Department when significant technological developments have occurred requiring additional knowledge in the area of classification for which the consultant or applicator has applied. When certification has been suspended or revoked, the Secretary shall require that each pest control consultant, pest control applicator, or public agency applicator take a special examination prepared and administered by the Department before certification may be reinstated or renewed.