15. A display energy certificate must—
(a)subject to regulation 16, express the operational rating of the building in a way approved by the Secretary of State under regulation 24 of the Building Regulations 2010;
(b)show the operational ratings for the building which were expressed in any certificates displayed by the occupier during the two years before the nominated date;
(c)include a reference value such as a current legal standard or benchmark;
(d)be issued by an energy assessor who is accredited to produce display energy certificates for that category of building;
(e)include the following information—
(i)the reference number under which the set of data from which the certificate may be produced has been entered onto the register in accordance with regulation 27;
(ii)the address of the building;
(iii)the total useful floor area of the building;
(iv)the name of the energy assessor who issued it;
(v)the name and address of the energy assessor’s employer, or, if he is self-employed, the name under which he trades and his address;
(vi)the date on which it was issued;
(vii)the nominated date; and
(viii)the name of the approved accreditation scheme of which the energy assessor is a member.