After section 441--
insert--
'(1) This section applies if an offer is proposed to be made under this Act and the offer is subject to conditions.
'(2) The offer must state--
(a) that, for it to be accepted, the conditions must be complied with before the offer period ends; and
(b) that it lapses if the conditions are not complied with within the offer period.
'(3) In this section--
offer period means the length of time stated in the offer, or if does not state a length of time, the 3 months provided for under section 442(1).'.