"1 (1) An officer of [HMRC] may by notice in writing require a person ("the taxpayer") -- (a) to provide information, or (b) to produce a document if the information or document is reasonably required by the officer for the purposes of checking the taxpayer's tax position. (2) In this schedule, "taxpayer notice" means a notice under this paragraph."
"Documents or information that we need [there follows an irrelevant paragraph on the extended meaning of "documents"] 1. Sight of your bank statements for all your accounts you have an interest [in] or have been interested [in] for the period between April 2010 and April 2011. 2. Full details of your personal income and expenditure for the period between April 2010 and April 2011."
"A reference in a provision of this Schedule to an authorised officer of [HMRC] is a reference to an officer of [HMRC] who is, or is a member of a class of officers who are, authorised by the Commissioners for the purposes of that provision."