28. Where, under an agreement entered into in respect of a debt or obligation, a person transfers property or an interest in property for the purpose of securing payment of the debt or performance of the obligation, the transfer is deemed not to be a supply.
Where, on payment of the debt or performance of the obligation or the extinguishing of the debt or obligation, the property or interest is retransferred, the retransfer of the property or interest is deemed not to be a supply.