European Union Bill

Does the noble Lord accept that, although competences are defined, powers are not? Paragraph 21 on page 5 of the Explanatory Notes says: "““As the majority of treaties and Article 48(6) decisions will require the exercise of judgement as to whether a transfer of power or competence is involved””." To me, the confusion between Clauses 1 and 3 arises because of the lack of a definition of ““power””, and I wonder whether the noble Lord can comment on that.