4If, in a case where sub-paragraph (5) of paragraph 2 above requires a claim made for a particular claim period to give all such information as is relevant for the purpose there mentioned in relation to an asset, a claim satisfying the requirements of that sub-paragraph is not made within twelve months after the end of that period, then, in carrying into effect the provisions of section 4 of this Act in relation to that asset for that claim period, the Board may proceed according to the best of their judgment, and may make any adjustments under any of the provisions mentioned in paragraph 6(2) of Schedule 4 to this Act accordingly.