38 POWERS TO INVESTIGATE, SEARCH AND ACCESS OR SEIZE AND INTERNATIONAL COOPERATION Definitions and interpretation 26. For purposes of this Chapter, unless the context indicates otherwise— "access" means to make use of, to gain entry to, to view, display, to retrieve, to copy data, or otherwise make use of a computer device, a computer network, a database, a critical database, an electronic communications network or a National Critical Information Infrastructure or their accessories or components or any part thereof; "article" means any data, a computer device, a computer network, a database, a critical database, an electronic communications network or a National Critical Information Infrastructure or any part thereof or any other information, instrument, device or equipment which— (a) is concerned in, connected with or is, on reasonable grounds, believed to be concerned in or connected with the commission or suspected commission; (b) may afford evidence of the commission or suspected commission; or (c) is intended to be used or is, on reasonable grounds, believed to be intended to be used in the commission, of an offence in terms of this Act or any other offence which may be committed by means of or facilitated through, the use of an article, whether within the Republic or elsewhere; "investigator" means an appropriately qualified, fit and proper person, who is not a member of a law enforcement agency, and who is appointed by the National Commissioner or the Director-General: State Security, on the strength of his or her expertise in order to, subject to the control and directions of a member of a law enforcement agency, assist a law enforcement agency in an investigation in terms of this Act;