“(8)  Where allowances have been made under both sections 16 and 18C in respect of any industrial building or structure, then, for the purposes of subsections (4) and (5), the sale, insurance, salvage or compensation moneys in respect of that building or structure shall be such amount of those moneys as the Comptroller determines to be reasonable in the circumstances.

(9)  Where the relevant interest in a building or structure in respect of which allowances have been made under section 16 is transferred at less than the open-market price, then for the purpose of determining the amount of any balancing charge under subsection (5), the relevant interest in the building or structure shall be treated as if it had been sold for an amount equal to the open-market price of the building or structure as at the date of transfer.”.