No stockyard owner, packer, market agency, or dealer shall employ any person who has been suspended as a registrant to perform activities in connection with livestock transactions subject to the jurisdiction of the Secretary under the Act during the period of such suspension: Provided, That the provisions of this section shall not be construed to prohibit the employment of any person who has been suspended as a registrant until such time as the person demonstrates solvency or obtains the bond required under the Act and regulations. No such person shall be employed, however, until after the expiration of any specified period of suspension contained in the order of suspension.