On an appeal to the Secretary of State under section 20 or 39 above, the Secretary of State may at his discretion afford to the appellant and the local authority an opportunity of appearing before, and being heard by, a person appointed by the Secretary of State for the purpose.

On determining such an appeal, the Secretary of State shall give such directions, if any, as he considers appropriate for giving effect to his determination.

Without prejudice to paragraph 10(c) of Schedule 1 to this Act, building regulations may, in connection with such an appeal, include such supplementary provisions with respect to procedure as the Secretary of State thinks fit.