4For the purposes of section 60 above—
(a)any advance to a development corporation made before the commencement of the [1965 c. 59.] New Towns Act 1965 under section 12(1) of the [1946 c. 68.] New Towns Act 1946, or
(b)any such advance made before the commencement of this Act under section 42(1) of that Act of 1965,
shall continue to be regarded as having been made under that section 12(1), or that section 42(1), as the case may be, and not under section 58(1) above (which corresponds to those provisions).