Whenever (1) the Secretary determines, as provided in section 499f of this title, that any commission merchant, dealer, or broker has violated any of the provisions of section 499b of this title, or (2) any commission merchant, dealer, or broker has been found guilty in a Federal court of having violated section 499n(b) of this title, the Secretary may publish the facts and circumstances of such violation and/or, by order, suspend the license of such offender for a period not to exceed ninety days, except that, if the violation is flagrant or repeated, the Secretary may, by order, revoke the license of the offender.