Complex sentence: Like other public authorities, ORR must comply with the rules of administrative law, and is amenable to judicial review, so it must act lawfully, rationally, proportionately and in accordance with the relevant rules of procedure.
Split into simpler sentences: Like other public authorities, ORR must comply with the rules of administrative law, and is amenable to judicial review. So, it must act lawfully, rationally, proportionately and in accordance with the relevant rules of procedure.