Where, under the existing statutory provisions, any excess of firstcategory expenditure over first category income of a programme contractorwould have been carried forward and treated as relevant first categoryexpenditure of his for an accounting period ending after 31st December 1989if those provisions had applied in relation to that period then the excessshall be carried forward and treated, under the new statutory provisions, asrelevant expenditure of the contractor for any accounting period which endsafter that date.