(1) This section applies in relation to implementation trial measures imposed in accordance with section 161C.
(2) The CMA must keep under review the effectiveness of the implementation trial measures.
(3) The CMA must, in particular, from time to time consider -
(a) whether an implementation trial measure has been or is being complied with;
(b) whether an undertaking accepted under section 161C is no longer appropriate and -
(i) one or more of the parties to it can be released from it; or
(ii) it needs to be varied or to be superseded by a new undertaking under that section; and
(c) whether an order made under section 161C is no longer appropriate and needs to be varied or revoked.
(4) The CMA must, within the implementation trial period, give the Secretary of State such advice as it considers appropriate in relation to -
(a) any possible variation or release by the Secretary of State of an undertaking accepted by the Secretary of State under section 161C;
(b) any possible new underta
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