50.—(1) An ECO4 project meets the minimum requirement for energy efficiency improvement in this article if it meets—
(a)condition A;
(b)where the participant’s exempted project allowance is not exhausted, condition B; or
(c)condition C.
(2) Condition A is met if the Administrator is satisfied, in relation to the domestic premises, that—
(a)if the pre-project SAP band is band D or E, the post-project SAP band is band A, B or C;
(b)if the pre-project SAP band is band F or G, the post-project SAP band is band A, B, C or D.
(3) Condition B is met if—
(a)the pre-project SAP band for the domestic premises is band E, F or G; and
(b)the Administrator is satisfied that—
(i)the ECO4 project could not meet condition A because—
(aa)to do so would require the installation of one or more measures which attract an exemption under Part 11; or
(bb)there is no combination of ECO4 eligible measures that would have enabled the project to meet condition A; and
(ii)as compared to the measures in the ECO4 project, no other combination of ECO4 eligible measures, excluding those attracting an exemption under Part 11, would have resulted in a larger increase in the SAP rating for the premises.
(4) Condition C is met if, in the case of domestic premises that have a pre-project SAP band of E, F or G, the Administrator is satisfied that neither condition A nor condition B could be met because there has been a change in the people who are occupying the premises.
(5) For the purposes of paragraph (1)(b), a participant’s exempted project allowance is not exhausted if X is less than the participant’s exempted project allowance, where “X” is the number of ECO4 projects promoted by the participant—
(a)which meet condition B in paragraph (3); and
(b)for which the Administrator has given a positive score under article 47(1)(b) before the ECO4 project in question.
(6) In this article, “post-project SAP band” has the meaning given in article 51.