to abide by the decision of the Commissioner. But in respect of
transfers after the commencement of the Act, the new owner is
warned that unless the tax assessed on the former owner is paid
he, the new owner, is personally liable, as if no election had been
made. In other words, the new owner may be relieved, but the
Treasury must not lose. That leads me to a conclusion which
harmonizes the section and gives to it a consistent, a just, and not
an erratic operation. The election permitted to the Commissioner
by the third branch of sub-sec. 2 is to make the responsibility of the
new owner begin with his ownership, and to substitute for his
assessability for the whole antecedent period the assessability of
the former owner. There is, so to speak, a discretionary line of -
demarcation drawn by the election between the assessability of the
former owner and that of the new owner. How that election may
be made and evidenced is a matter for consideration under the second
question. But assuming an effective election, it is nevertheless
subject to sub-sec. 5. Sub-sec. 5 is not an independent provision.
As such it would be unnecessary, because the new owner is himself
primarily liable. But the sub-section assumes that somewhere in
the Act, and presumably in the section, his primary and unconditional
responsibility has ceased and the responsibility of the former owner
has been substituted. Nowhere can the power to do this be found
except in sub-sec. 2. The words " may subsequently be assessed "
mean under sub-sec. 2, in the third case of that sub-section. But
the conditional responsibility of the new owner would be singularly
ineffective unless it extended to the whole period for which the
former owner was assessable, and it would be both grotesque and,
possibly, in the main, ineffective, unless the former owner were
assessable for the whole period of his responsibility as that stood at
the moment of transfer. In short, the Commissioner's election, if
made, makes the former owner assessable for the whole back period,
and the new owner conditionally free, but secondly assessable by
way of security.