If a person disposes of assets, the amount of the disposition is:
(a) if the person receives no consideration for the destruction, disposal or diminution--an amount equal to:
(i) the value of the assets that are destroyed; or
(ii) the value of the assets that are disposed of; or
(iii) the amount of the diminution in the value of the assets whose value is diminished; or
(b) if the person receives consideration for the destruction, disposal or diminution--an amount equal to:
(i) the value of the assets that are destroyed; or
(ii) the value of the assets that are disposed of; or
(iii) the amount of the diminution in the value of the assets whose value is diminished;
less the amount of the consideration received by the person in respect of the destruction, disposal or diminution.