4. This Order applies to Scotland only in respect of a claim for the recovery of maintenance where the Secretary of State would have had jurisdiction to make a maintenance calculation (within the meaning of the Child Support Act 1991) as regards that maintenance with respect to a child—
(a)who is the applicant claiming the maintenance; or
(b)where the applicant claiming the maintenance is another person in relation to whom the Secretary of State has arranged for the collection of payments for that child’s benefit.