Budget Responsibility and National Audit Bill [HL]

My Lords, before the noble Lord leaves the issue of independence, I wonder whether he can help me. Clause 5(2) states very clearly: "““The Office must perform that duty objectively, transparently and impartially””." Everyone must applaud that wording. But then Clause 6(1) states clearly: "““The Charter for Budget Responsibility may include guidance to the Office about how it should perform its duty under section 4, including (in particular) guidance about … what subsections (2) and (3) of section 5 entail””." So, is there to be guidance about what impartiality entails?