; (B) for the investigation of those complaints which the Secretary deems appropriate to investigate; and (C) for providing notification to the Immigration and Employee Rights Section of the Civil Rights Division of the Department of Justice of potential violations of section 274B. (2) Authority in investigations In conducting investigations and proceedings under this subsection— (A) immigration officers shall have reasonable access to examine evidence of the employer being investigated; (B) immigration officers designated by the Secretary, and administrative law judges and other persons authorized to conduct proceedings under this section, may compel by subpoena the attendance of relevant witnesses and the production of relevant evidence at any designated place in an investigation or case under this subsection. In case of refusal to fully comply with a subpoena lawfully issued under this paragraph, the Secretary may request that the Attorney General apply in an appropriate district court of the United States for an order requiring compliance with the subpoena, and any failure to obey such order may be punished by the court as contempt. Failure to cooperate with the subpoena shall be subject to further penalties, including further fines and the voiding of any mitigation of penalties or termination of proceedings under paragraph (4)(E); and (C) the Secretary, in cooperation with the Commissioner and Attorney General, and in consultation with other relevant agencies, shall establish a Joint Employment Fraud Task Force consisting of, at a minimum— (i) the System’s compliance personnel; (ii) immigration law enforcement officers; (iii) personnel of the Immigrant and Employee Rights Section of the Civil Rights Division of the Department of Justice; (iv) personnel of the Office for Civil Rights and Civil Liberties of the Department