A takaful firm operating on a basis other than that prescribed by Paragraph CA-8.2.1 at the date the Rulebook comes into force, must in respect of all takaful contracts written after this date, manage those contracts in accordance with Paragraph CA-8.2.1. Takaful contracts written before this date hereafter referred to as pre-existing contracts, must continue to be managed in accordance with the takaful model or models operated by the takaful firm prior to Paragraph CA-8.2.1 coming into force, until such time as all obligations of the takaful fund or funds under those pre-existing contracts have been discharged in full.