No commissioner or employee of any local agency shall acquire any interest, direct or indirect, in any project or in any property included or planned to be included in any project, nor have any interest, direct or indirect, in any contract or proposed contract for materials or service to be furnished or used in connection with any project. This section shall not apply to the deposit of any funds of an agency in any bank in which a member of an agency shall have an interest, if the funds are deposited and protected in accordance with chapter 118A.