An energy assessor who issues a document referred to in paragraph (1)(a) or (b) must ensure that the data which, in accordance with the methodology of calculation of the energy performance of buildings approved by the Secretary of State under regulation 24 of the Building Regulations 2010 M1, was used to calculate any asset rating or operational rating, and to produce the document, is entered onto the relevant register before the assessor gives the document to the person who requested that it be issued.

Where an energy assessor issues an energy performance certificate relating to a green deal property, the data which the assessor must ensure is entered onto the relevant register in accordance with paragraph (2) includes the green deal information relating to that property.

An energy assessor who issues an inspection report must ensure that the data required by regulation 19(3) to be included in the report is entered onto the relevant register before the assessor gives the document to the relevant person.

The green deal information entered onto the relevant register in respect of a green deal property may be altered in accordance with provision made under section 11(6) of the Energy Act 2011.

An energy assessor who issues a recommendation report (whether as part of an energy performance certificate under regulation 9(1)(d) or as a separate document) must ensure that the data that is required to be included in the report by regulation 4(2) (recommendation reports) is entered onto the relevant register before the assessor gives the report to the person who requested that it be issued.

Any data entered on the register must be kept on the register for a period of at least 20 years beginning on the date on which it is entered onto the register.