(1)A person is required to bring a disposal value into account for the chargeable period in which he sells know-how on which he has incurred qualifying expenditure.
(2)The disposal value to be brought into account is the net proceeds of the sale, so far as they consist of capital sums.
(3)But no disposal value need be brought into account if the consideration received for the sale is treated as a payment for goodwill under section 531(2) of ICTA (consideration for know-how on disposal of trade to be treated as payment for goodwill, unless parties otherwise elect).