Every girl shall be entitled to a trial on parole before reaching the age of twenty years, such parole to continue for at least one year unless violated. The superintendent and resident physician, with the approval of the secretary, shall determine whether such parole has been violated. Any girl committed to the school who shall escape therefrom, or who shall violate a parole, may be apprehended and returned to the school by any officer or citizen on written order or request of the superintendent.