3.—(1) The Welsh Ministers must review the need for the restrictions and requirements imposed by these Regulations, and whether those restrictions are proportionate to what the Welsh Ministers seek to achieve by them—
(a)at least once in the period from 11 January 2021 to 28 January 2021;
(b)at least once in each subsequent period of 21 days.
(2) These Regulations expire at the end of the day on 31 March 2021.