17(1)For subsections (6) and (7) of section 50 of the Management Act (procedure on appeal) there shall be substituted the following subsections—
“(6)If, on an appeal, it appears to the majority of the Commissioners present at the hearing, by examination of the appellant on oath or affirmation, or by other lawful evidence—
(a)that, by reason of an amendment under section 28A(2) or (4) of this Act, the appellant is overcharged by a self-assessment;
(b)that, by reason of an amendment under section 28B(3) or 30B(1) of this Act, any amounts contained in a partnership statement are excessive; or
(c)that the appellant is overcharged by an assessment other than a self-assessment,
the assessment or amounts shall be reduced accordingly, but otherwise the assessment or statement shall stand good.
(7)If, on an appeal, it appears to the Commissioners—
(a)that the appellant is undercharged to tax by a self-assessment which has been amended under section 28A(2) or (4) of this Act;
(b)that any amounts contained in a partnership statement which has been amended under section 28B(3) or 30B(1) of this Act are insufficient; or
(c)that the appellant is undercharged by an assessment other than a self-assessment,
the assessment or amounts shall be increased accordingly.”
(2)In subsection (8) of that section, after the words “an assessment” there shall be inserted the words “ (other than a self-assessment) ”.
(3)After that subsection there shall be inserted the following subsection—
“(9)Where any amounts contained in a partnership statement are reduced under subsection (6) above or increased under subsection (7) above, an officer of the Board shall by notice to the partners so amend their self-assessments under section 9 or 11AA of this Act as to give effect to the reductions or increases of those amounts.”