within the meaning of the proviso to sec. 37 (2). The questions
were not discussed whether the attorney was notified of the assess-
ment as under sec. 89 and, if so, whether, having regard to secs.
40, 54 (1) and 57, such a notification set time running against the
taxpayer under sec. 37, and, if on the other hand notification was
not sent to the attorney as under sec. 89, whether it was " given to
_ the person liable to pay the . . . tax' within sec. 40 (1) and "served
by post" within sec. 54 (1) as affected by sec. 29 of the Acts
Interpretation Act 1901. These questions, however, do not arise
unless the limitation of time prescribed by sec. 37 applies to the
right of a taxpayer to a rebate under sec. 18, and I am clearly of
_ opinion that it does not so apply. The limitation of time relates only
to alterations in or additions to assessments made under sub-sec. 1
of sec. 37. This sub-section says that the Commissioner may at any
time cause to be made all such alterations in or additions to any
"assessment as he thinks necessary to ensure its completeness and
accuracy.
The nature of this provision has been explained in Ex parte
Carpathia Tin Mining Co. (1); Ex parte Hooper (2); Williams,
Kent & Oo. v. Federal Commissioner of Taxation (3); and the
Federal Commissioner of Taxation v. S. Hoffnung & Co. (4). In
the last case the present Chief Justice said (5) : - ' An 'alteration or
addition' is not something extraneous to a standing assessment.
When an alteration or addition is made the assessment henceforth
exists as altered or added to, and not as previously existing plus
independent alteration or addition." The question, therefore, really
'is whether the rebate under sec. 18 is an allowance to the taxpayer in
his assessment, i.e., a deduction which ought to be made in assessing
him, or on the other hand is a rebate of the tax for which he would
be liable upon the assessment.
The first view may be expressed by saying that sec. 18 (1) must
be understood as if it said that the taxpayer " shall be entitled in
is assessment to a rebate of tax." The second view may be expressed
by saying that sec. 18 (1) must be understood as if it said that the
axpayer "shall be entitled to a rebate of the tax paid or payable