16(1)Nothing in paragraph 13, 14 or 15 above shall require information to be contained in the return concerned to the extent that—
(a)before the expiry of the period concerned the information has been provided to the Board by any person in pursuance of the paragraph concerned or of any other provision, or
(b)after the expiry of the period concerned the information falls to be provided to the Board by any person in pursuance of any provision other than the paragraph concerned.
(2)Nothing in paragraph 13, 14 or 15 above shall require a return to be delivered if—
(a)before the expiry of the period concerned all the information concerned has been provided to the Board by any person in pursuance of the paragraph concerned or of any other provision, or
(b)after the expiry of the period concerned all the information concerned falls to be provided to the Board by any person in pursuance of any provision other than the paragraph concerned.