(31)Consolidated financial statements should present the activities of a parent undertaking and its subsidiaries as a single economic entity (a group). Undertakings controlled by the parent undertaking should be considered as subsidiary undertakings. Control should be based on holding a majority of voting rights, but control may also exist where there are agreements with fellow shareholders or members. In certain circumstances control may be effectively exercised where the parent holds a minority or none of the shares in the subsidiary. Member States should be entitled to require that undertakings not subject to control, but which are managed on a unified basis or have a common administrative, managerial or supervisory body, be included in consolidated financial statements.