17.—(1) A display energy certificate must—
(a)subject to regulation 18, express—
(i)the operational rating; and
(ii)the asset rating,
of the building in ways approved by the Secretary of State under regulation 17A of the Building Regulations 2000;
(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 certificate has been registered in accordance with regulation 31;
(ii)the address of the building;
(iii)an estimate of 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.