A person subject to this article has an interest which is in substantial conflict with the proper discharge of his duties in the public interest and of his responsibilities as prescribed in the laws of this state or a personal interest, arising from any situation, within the scope of this article, if he has reason to believe or expect that he will derive a direct monetary gain or suffer a direct monetary loss, as the case may be, by reason of his official activity. He does not have an interest which is in substantial conflict with the proper discharge of his duties in the public interest and of his responsibilities as prescribed in the laws of this state or a personal interest, arising from any situation, within the scope of this article, if any benefit or detriment accrues to him as a member of a business, profession, occupation, or group to no greater extent than any other member of that business, profession, occupation, or group.