73. A person authorized in writing by the director general of the Office may enter, during working hours, the premises of a person, organization or business that has received a subsidy to ensure compliance with this Act, the regulations or the terms of a program, directive or agreement made with the Office, or to make sure that the subsidy is used for the purposes for which it was granted. The authorized person may require any pertinent information, examine any relevant book, register or document and make copies. The authorized person may also require any person on the premises to give reasonable assistance, and must, on request, produce a certificate attesting to the authorization received and bearing the signature of the director general of the Office.