12. Yn rheoliad 8(1)—
(a)yn is-baragraff (a), ar ôl “26 (CO2 emission rates for new buildings),” mewnosoder “26A (primary energy consumption rates for new buildings), 26B (fabric performance values for new dwellings),”; a
(b)yn is-baragraff (b), ar ôl “27,” mewnosoder “27A, 27B,”.