No commissioner or employee of an authority may acquire any direct or indirect interest in any housing project or in any property included or planned to be included in any project, nor may such a person have any direct or indirect interest in any contract or proposed contract for materials or services to be furnished or used in connection with any housing project. If any commissioner or employee of an authority owns or controls a direct or indirect interest in any    property included or planned to be included in any housing project, that person immediately shall disclose the same in writing to the authority, and such disclosure must be entered upon the minutes of the authority. Failure to disclose such interest constitutes misconduct in office.