No person, organization or association or any bargaining representative of the employees or any representative or agent of the management of the utility shall interfere with or obstruct the Governor, or any state representative or agent designated by him, in his efforts to secure or contract for the services of the officers and employees of the utility or of any person to engage in or continue the operation of the utility, or shall encourage or solicit any such persons not to render such services or shall interfere in or obstruct the training of prospective employees in the operation of the utility by the Governor or by the designated state representatives. Upon seizure of any utility as provided herein the establishment or conduct of a picket line near or adjacent to any work engaged in or proposed to be engaged in by any such persons employed or sought to be employed by the Commonwealth in its operation of such utility shall be deemed an unlawful obstruction of the exercise of an essential function of the state government and a violation of this section; and all persons ordering, directing, encouraging or participating in any such picketing shall be guilty of violating this section.