(1) The amount of training levy payable is the amount ascertained by multiplying the value of the work by the rate of levy.
(2) In this section—
(a) where the construction work has been completed under a contract that fixes its total cost—the amount fixed by the contract; or
(b) in any other case where the work has been completed or where the work, having been commenced, is abandoned before being completed—such amount as is agreed by the Board and the project owner to be the cost of the work or, in default of agreement, such amount as is determined by a qualified valuer appointed by the Council.