¹[5. The Board may, by notification in the official Gazette, and subject to such limitations or conditions, if any, as may be specified therein, empower by name or designation- ²[(a) any Additional Commissioner of Customs to exercise any of the powers of a Commissioner of Customs specified in clauses (a), (b), (c) and (d) of section 3;] (b) any Joint Commissioner of Customs to exercise any of the powers of an Additional Commissioner of Customs or a Commissioner of Customs ³[specified at clauses (a), (c) and (d) of section 3]; (c) any Deputy Commissioner of Customs to exercise any of the powers of a Joint Commissioner of Customs or an Additional Commissioner of Customs; (d) any Assistant Commissioner of Customs to exercise any of the powers of a Deputy Commissioner of Customs; (e) any other officer of Customs to exercise any of the powers of an Assistant Commissioner of Customs.]