(1) Section 652 of the Principal Act is amended by the substitution for subsection (5) of the following:
(a) Subsection (4) shall not apply to a relevant disposal made to an authority possessing compulsory purchase powers where the disposal is made -
(i) for the purposes of enabling the authority to construct, widen or extend a road or part of a road, or
(ii) for a purpose connected with or ancillary to the construction, widening or extension of a road or part of a road by the authority.
(b) Where section 605 applies to a relevant disposal by virtue of this subsection that section shall be construed as if for subsection (4) of that section the following were substituted:
'(4) This section shall apply only if the acquisition of the replacement assets takes place, or an unconditional contract for the acquisition is entered into, in the period beginning 2 years before and ending 8 years after the disposal of the original assets, or at such earlier or later time as the Revenue Commiss
…