10(1)If a person fails to deliver a return within the time within which he is required to deliver it under paragraph 9 above he shall be liable, subject to sub-paragraph (3) below—
(a)to a penalty not exceeding, except in the case mentioned in sub-paragraph (2) below, £500 ; and
(b)it the failure continues after it has been declared by the court or the Special Ganimissioners before whom proceedings for the penalty have been commenced, to a further penalty not exceeding £100 for each day on which the failure so continues.
(2)If the failure continues after the end of six months from the time by which the return ought to have been delivered, the penalty under sub-paragraph (1)(a) above shall be an amount not exceeding the aggregate of £500 and the total amount of the tax with which the person in question is chargeable.
(3)Except in the case mentioned in sub-paragraph (2) above, a person shall not be liable to any penalty incurred under this paragraph for failure to deliver a return if the failure is remedied before proceedings for the recovery of the penalty are commenced.