s 12A Final day for making objections
(1) For the purposes of sections 11 and 12, the day specified as the final day for making objections must be the last day, or a day after the last day, of the period of 21 days beginning with the first day at the beginning of which the acquiring authority expects that all of the following conditions will be satisfied. (2) The conditions are that— (a) a notice has been published for the first time as required by section 11(1)(a), (b) publication as required by section 11(1)(b) has begun, (c) a notice has been affixed as required by section 11(3), and (d) a notice has been served on every qualifying person as required by section 12(1).