7(1)A scheme made by the Post Office under section 28 of the 1969 Act which is effective on the appointed day and relates to services which, by virtue of this Act, are to be provided by the Corporation shall, so far as so relating, have effect, as from that day, as if made by the Corporation under section 21.
(2)Any charges fixed under any such scheme, so far as so relating, shall have effect as if fixed under a scheme made under section 21.
(3)A scheme made under section 21 which is to come into effect on the appointed day may revoke or amend any such scheme as is mentioned in sub-paragraph (1).