51. An authorised officer may exercise powers under section 36 of the Act of 2014 (as applied by section 46) and section 50 of this Act, for the purpose of assisting the Commission to perform its functions—

(a) under Article 57(2) in relation to an investigation by a Member State Digital Services Coordinator or other Member State competent authority,

(b) under Article 60(4) in relation to a joint investigation led by a Member State Digital Services Coordinator, or

(c) under Article 66(3) in relation to an investigation conducted by the European Commission.