(e) Whenever a contracting officer has reason to believe that forced or indentured child labor was used to mine, produce, or manufacture an end product furnished pursuant to a contract awarded subject to the certification required in paragraph (c) of this section, the contracting officer must refer the matter for investigation by the agency’s Inspector General, the Attorney General, or the Secretary of the Treasury, whichever is determined appropriate in accordance with agency procedures, except to the extent that the end product is from the country listed in paragraph (b) of this section, under a contract exceeding the applicable threshold.