the sums advanced to development corporations before the commencement of this Act under section 12(1) of the M1New Towns Act 1946 in its application to England and Wales or under section 42(1) of the M2New Towns Act 1965, and, after the commencement of this Act, under section 58(1) above, (which corresponds to those subsections),

the sums advanced to development corporations before the commencement of the M3New Towns (Scotland) Act 1968 under that section 12(1) in its application to Scotland (to which section 37(1) of that Act of 1968 corresponds) and, after the commencement of that Act of 1968, under that section 37(1);

the sums advanced to the Commission before the commencement of this Act under section 3(1) of the M4New Towns Act 1959 or under section 42(4) of that Act of 1965, and, after the commencement of this Act, under section 58(5) above (which corresponds to those subsections), and

the sums borrowed (whether by development corporations or by the Commission) before the commencement of this Act under section 42A of that Act of 1965 and, after the commencement of this Act, under section 59 above (which corresponds to that section), or under section 37A of that Act of 1968,