(27)In order to ensure cooperation between the Commission and competent authorities designated under this Regulation and authorities designated under other relevant Union and national law and in order to ensure consistency in their actions and decisions, the Commission and competent authorities designated under this Regulation should request information from other relevant authorities, where necessary, regarding whether economic operators under assessment are subject to and carry out due diligence in relation to forced labour in accordance with applicable Union or national law setting out due diligence and transparency requirements with respect to forced labour. When requesting information from economic operators, competent authorities should, where possible, follow the Commission’s once-only principle, through increased cooperation and dialogue between authorities who are engaged in overseeing product regulation. For the same purposes, and where appropriate, competent authorities designated under this Regulation should inform other relevant authorities, such as market surveillance authorities, of their actions and decisions.