These Regulations prescribe the descriptions of persons to whom the Inland Revenue may give a notice requiring the production of documents and the provision of information in connection with the matters mentioned in section 252(3) of the Finance Act 2004. Section 252(3) relates , among other things, to information about pension schemes which are or have been registered under Part 4 of that Act, or which are the subject of an application for registration and annuities purchased with sums or assets held for the purposes of a registered pension scheme.