Principles of good administration require that situations should be avoided where the impression is given that a person or authority called upon to decide on a matter might be perceived as being partial. However, this risk clearly exists when the person or authority dealing with an Article 90(2) complaint against a decision was closely involved in the adoption of that very same decision. An official to whom any such decision is addressed could have legitimate reason to doubt whether his or her Article 90(2) complaint was handled properly.