The only income that is taxed under the Act of 1912 is
"income derived from any source in the State." That income is
divided by the Act into two classes, viz., "income derived from
personal exertion" and "income derived from property." The
tirst " means " (not " includes ") income consisting of the proceeds
of any business, earnings, salaries, wages, fees, bonuses, pensions,
and payments made upon superannuation or retirement from
employment. The latter means income derived from any source
in the State other than from personal exertion, that is, any
other than the sources previously enumerated. It is clear that
the only possible relevant head of "personal exertion"
ness," which, besides bearing its own natural meaning, is defined
to "include" any profession, trade, employment, or vocation. The
division has a double importance, first because it helps to elucidate
the present contest, and also because it may in any given case
affect the amount of tax. See Schedule to Act No, 24 of 1911.
If, for instance, the sum here in question is the produce of
"property," higher taxation results than if it be the produce of
"business."