71Amendment of assessments

#### 71 Amendment of assessments (1) The Commissioner may, at any time within a period of 3 years after the date of an assessment by him of duty or tax, amend the assessment by making such alterations or additions to it as he thinks necessary. (2) Subsection (1) does not prevent the amendment of an assessment after the expiration of the period referred to in that subsection in order to give effect to a decision on an appeal or review under Part V, or the amendment of an assessment after the expiration of that period by way of reduction on an objection under that Part or pending such an appeal or review. (3) Where, by reason of an amendment of an assessment, a person’s liability to duty or tax is reduced, the amount by which the duty or tax is so reduced shall be taken, for the purposes of section 81, never to have been payable. (4) As soon as practicable after the amendment of an assessment under this section, the Commissioner shall cause notice in writing of the amended assessment and the amount of duty or tax payable in accordance with the amended assessment, together with the amount of any duty or tax underpaid or overpaid, to be given to the person who is adjudged by him to be the person liable to pay the duty or tax. (5) In this section, duty or tax includes an additional amount payable under section 70. (6) In subsection (4), unless the contrary intention appears, duty or tax also includes an additional amount payable under section 81.