However section 4 “Explanatory note” may be of use to all building control bodies, including local authorities, as guidance for elements of the wider regulatory regime.
Fodd bynnag, gall adran 4 "Nodyn esboniadol" fod o ddefnydd i bob corff rheolaeth adeiladu, gan gynnwys awdurdodau lleol, fel canllaw ar gyfer rhannau o'r drefn reoleiddio ehangach.