47.—(1) If at any time it is brought to the notice of any executor or other person accountable for estate duty that the property subject to estate duty on the death of the deceased was of greater value than that on which estate duty was actually computed, such executor or person, as the case may be, shall —
(a)
within one month after such notice, or within such further time as the Commissioner may allow, deliver a further estate duty affidavit or further account;
(b)
pay the difference between the duty leviable according to the true value of the estate and the duty already paid; and
(c)
at the same time pay to the Commissioner interest upon such difference at the appropriate rates specified in the Sixth Schedule from the date of the death, or from such subsequent date as the Commissioner may in the circumstances think proper, to the date of payment.
(2) If any person, who ought to deliver a further affidavit or account as mentioned in subsection (1), neglects to do so within the prescribed period, he shall forfeit to the Government the sum of $1,000 and shall also be liable to pay to the Government double the amount of additional duty leviable.
(3) If an application has been made under section 48(1) in respect of a notice of assessment, no claim shall be made for the return of excess duty or for the payment of additional duty except on the ground that the particulars of the property passing on the death of the deceased, or the general expenses, debts or encumbrances for which allowance was made, were not correctly stated in the affidavit or account.