19.—(1) The Department must, in relation to each application for a maintenance calculation, fix a date at which the non-resident parent’s gross weekly income is to be reviewed by reference to an updated HMRC figure (“the review date”).
(2) Subject to paragraph (3), the first review date falls 12 months after the initial effective date and subsequent review dates fall on each anniversary of that date, unless the Department decides in any particular case or class of case to fix a different date.
(3) Where a maintenance calculation is in force and there is a further application in relation to the non-resident parent in respect of a new qualifying child, the review dates are to be aligned so that the first review date in respect of the new application is the next review date for the calculation already in force.
(4) Where an application for a maintenance calculation in relation to both non-resident parents of a qualifying child is treated as a single application by virtue of regulation 10(3) the Department may fix different review dates in respect of each non-resident parent.