"77D. (1) In this section -
. . . 'moneys paid on shares', in relation to a company, means
moneys paid to the company on or after the first day of July,
One thousand nine hundred and sixty-nine, in respect of shares
in the company by the owners of the shares, including owners
who are beneficial owners only, but does not include - " (then
follow certain paragraphs not material to this appeal)
. . .
"(3) Subject to this section, a mining company that has, in a
year of income, received moneys paid on shares may, for the
purposes of the next succeeding sub-section and Divisions 10 and
10AA of this Part, within one month after the end of that year of
income or within such further time as the Commissioner allows,
lodge with the Commissioner a declaration in writing signed by
the public officer of the company that the company has expended,
or proposes to expend, such of those moneys as are specified in
the declaration upon mining or prospecting outgoings.
"(4) The amount of any moneys paid on shares paid by a
person in a year of income of that person to a company and
included in moneys specified in a declaration lodged by the
company under the last preceding sub-section shall, subject to
this section, be an allowable deduction from the assessable
income derived by that person in that year of income.
"(5) If, at any time, the Commissioner is not satisfied, as to any
moneys specified in a declaration duly lodged by a company
under sub-section (3) of this section, that those moneys have been
or will be expended by the company in accordance with the
declaration, the Commissioner may inform the company, by
notice in writing given for the purposes of this sub-section, that
he is not so satisfied and, upon the company being so informed,
the amount of any deduction allowable under the last preceding
sub-section by virtue of the declaration shall be reduced by an
amount which bears to the amount of the deduction before being
so reduced the same proportion as the amount of the moneys as to
which the Commissioner is not so satisfied bears to the amount of
the moneys specified in the declaration." (at p150)