Collier,
J:—The
plaintiff
is
appealing
the
reassessment
by
the
Minister
of
National
Revenue,
of
its
1974
income
tax.
The
facts,
most
of
which
were
agreed
upon,
are,
from
a
tax
point
of
view,
somewhat
unusual.
There
was
a
difference
of
opinion
between
two
expert
witnesses.
At
the
material
times,
the
plaintiff
was
a
mining
company,
operating
at
Faro,
YT.
It
was
a
subsidiary
of
a
United
States
company.
Prior
to
1969,
it
developed
a
new
mine
at
Faro.
The
mine
came
into
commercial
production
effective
February
1,
1970.
It
qualified
for
exemption
from
tax
for
three
years
from
that
date:
subsection
83(5)
(now
repealed)
of
the
Income
Tax
Act.
More
accurately,
for
the
three-year
period,
the
income
derived
from
the
mining
operation
“shall
not
be
included
in
computing
the
income
of
a
corporation”.
The
plaintiffs
exclusion
period
ran,
therefore,
from
February
1,
1970
to
January
31,
1973.
The
plaintiff’s
taxation
year
was
the
calendar
year.
The
plaintiff
filed
income
tax
returns,
accompanied
by
financial
statements,
for
the
years
1969
through
1974.
Its
“taxable
income”
or
“net
income
for
income
tax
purposes”,
for
the
years
1969
through
1973,
was
shown
as
“nil”
(see
Exhibits
6-10).
For
1974,
its
net
income
for
income
tax
purposes
was
declared
at
approximately
$7.5
million.
In
all
of
the
financial
statements
for
those
years,
concentrate
inventory
was
valued
by
the
company
at
cost.
As
I
understood
it,
the
plaintiff,
because
its
parent
company
adopted
(in
the
United
States)
the
lower
of
cost
or
fair
market
value,
chose
the
same
basis
of
valuation.
In
its
financial
statements
for
1973,
the
opening
inventory
figure
was
the
same
as
the
closing
inventory
figure
for
the
preceding
fiscal
period
ending
December
31,
1972.
All
the
financial
statements,
accompanying
the
income
tax
returns
for
the
years
earlier
referred
to,
used
that
same
method:
the
closing
figure
for
the
previous
period
became
the
opening
figure
for
the
new
fiscal
year.
In
its
return
for
1973,
the
financial
statements
for
the
whole
year
contained
a
statement
for
the
one-month
period
ending
January
31,
1973:
the
only
portion
of
that
year
in
which
any
income
from
the
mining
operation
for
that
period
was,
by
subsec
85(3),
not
to
be
included.
That
was
the
end
of
the
so-called
“exempt
period”.
The
closing
inventory,
as
of
January
31,
1973,
was,
as
usual,
valued
at
cost.
In
computing
its
income
for
1973,
exploration
and
development
expenses
were
deducted
in
an
amount
sufficient
to
reduce
its
taxable
income
to
nil.
The
Revenue
Department
assessed
on
that
basis.
In
computing
its
income
for
1974,
exploration
and
development
expenses
were
again
deducted.
As
earlier
noted,
its
net
income
was
filed
at
approximately
$7.5
million.
In
1977
and
1978
there
was
a
dispute
between
the
plaintiff
and
the
Revenue
Department
as
to
the
correct
treatment
of
certain
“deferred”
sales
in
1973.
The
plaintiff’s
advisers
felt
the
problem
could
be
resolved
by
valuing
the
inventory,
as
of
January
31,
1973,
at
market,
and
so
advised
the
Department.
That
concentrate
inventory
had,
in
fact,
been
produced
in
the
"exempt"
period.
Cost
value
was
$2,343,000.
Market
was
$4,985,000.
The
difference
was
$2,642,000.
This,
if
done
and
accepted,
would
have
decreased
taxable
income
for
the
eleven-month
period,
February
1,
1973
to
the
end
of
the
year,
by
the
same
figure.
That
proposed
inventory
valuation
adjustment
remained
unresolved
until
the
plaintiff
was,
on
January
21,
1976,
assessed
for
the
year
1974,
the
first
year
in
which
it
showed
net
taxable
income.
There
was
a
reassessment
dated
December
21,
1979.
The
plaintiff
objected,
and
appealed,
contending
its
income
for
1974
was
.
.
overstated
by
$2,642,000.00,
being
the
difference
between
cost
and
market
value
of
its
closing
inventory
at
January
31,
1973/'
(Agreed
facts)
Put
another
way,
the
plaintiff
says
it
is
entitled
to
change
the
valuation
of
inventory,
at
the
beginning
and
end
of
the
three-year
period,
from
cost
to
market.
This
has
a
two-fold
effect:
(a)
It
puts
$2,642,000
income,
now
in
1974,
back
into
the
three-year
"exempt"
period.
(b)
The
plaintiff
has
conceded,
if
it
is
entitled
to
change
from
cost
to
market,
it
should
make
the
same
change
at
the
beginning
of
the
"exempt"
period.
The
concession
was
made
from
an
accuracy
and
consistency
point
of
view;
it
was
pointed
out
there
is
nothing
in
the
Income
Tax
Act
requiring
the
same
method
of
valuation
to
be
used
at
the
beginning
and
end
of
a
fiscal
period.
The
difference
between
cost
and
market,
at
January
31,
1970,
was
$339,000.
The
effect
of
the
valuation
change
is
to
put
$339,000
income
into
the
period
preceding
February
1,
1970.
If
the
plaintiff
is
right
in
its
contention
that
these
changes
are,
within
the
Income
Tax
Act,
permitted,
there
are
further
consequences.
I
quote
directly
from
the
evidence,
in
chief,
of
the
witness
Andrew,
the
vice-president
and
comptroller
of
the
plaintiff:
Q
Now
how
is
it
that
the
value
of
closing
inventory
at
market
at
the
end
of
the
exempt
period,
January
31,
’73,
apparently
came
up
in
connection
with
the
1974
taxation
year?
A
For
the
taxation
year
1973,
for
which
we
would
be
taxable
for
eleven
months
only,
we
had
more
than
sufficient
allowances
for
expenditures
on
exploration
and
development,
and
for
expenditures
qualifying
for
capital
cost
allowance.
These
expenditures
were
more
than
was
necessary
to
offset
taxable
income
in
the
year
’73.
These
amounts
would
therefore
carry
over
into
the
year
1974
during
which
we
had
substantial
taxable
income.
And
these
were
not
sufficient
to
write
off
or
offset
the
whole
taxable
income
of
the
year
1974.
And
therefore,
this
is
the
first
year
in
the
sequence
of
Cyprus
Anvil’s
business
where
the
effect
of
revaluing
our
inventory
under
the
tax
laws
would
have
a
beneficial
tax
effect
on
the
company.
During
the
"exempt"
period,
the
plaintiff
deliberately
did
not
claim,
in
its
returns,
capital
cost
allowance,
or
deductions
for
drilling
and
exploration
expenses.
There
is
one
further
relevant
fact.
The
plaintiff
had
long-term
contracts,
into
1977,
with
Japanese
and
German
interests,
to
purchase
all
the
mine
concentrates
produced.
Delivery
was
to
commence
in
late
1969.
The
prices
were
fixed
pursuant
to
a
formula
based
on
world
prices
from
time
to
time
over
the
contract
years.
I
turn
now
to
the
issue
on
this
appeal.
Is
the
plaintiff
legally
entitled,
in
this
case,
to
change,
for
the
three-year
period
when
its
income
from
the
mine
was
not
to
be
included
in
the
calculation
of
its
taxable
income,
the
valuation
of
its
inventory
from
cost
to
market?
Counsel
for
the
plaintiff
submitted
it
is,
on
both
technical
and
conceptual
grounds.
Counsel
for
the
defendant
relied
primarily
on
the
proposition,
based
on
generally
accepted
accounting
principles
(GAAP),
requiring
consistency
from
year
to
year
in
accounting
methods,
including
methods
of
valuing
inventory;
the
statute
does
not
authorize
major
departures
of
that
kind
where
the
only
purpose
is
to
reduce
tax.
I
say,
at
this
point,
reduction
of
tax
can
be
a
legitimate
business
purpose:
Stubart
Investments
Ltd
v
The
Queen,
[1984]
1
SCR
536,
at
540
and
575;
[1984]
CTC
294
at
314
and
318.
The
plaintiff
agreed
the
consistency
rule
of
generally
accepted
accounting
principles
is
applicable
to
treatment
of
inventory.
It
also
agreed,
in
computing
profit
from
its
business
for
the
year,
“.
.
.
profit
must
be
determined
on
ordinary
commercial
principles
unless
the
provisions
of
the
Income
Tax
Act
require
a
departure
from
such
principles/':
Dominion
Taxicab
Association
v
MNR,
[1954]
SCR
82,
at
85;
[1954]
CTC
34
at
37.
The
witness
Harrison
is
a
well-qualified
chartered
accountant
with
extensive
private
practice.
He
testified
for
the
plaintiff.
He
gave
a
number
of
examples
where
there
were
important
differences
between
income,
calculated
in
accordance
with
gaap,
and
income,
calculated
for
tax
purposes
—
differences
permitted
by
the
statute.
He
noted,
among
others:
book
depreciation
as
contrasted
with
capital
cost
allowance;
exploration
and
developments
costs,
which
for
tax
purposes
can
be
deferred;
the
choices
in
valuation
of
inventory,
with
no
rules
requiring
consistency.
I
have
confined
my
references
to
the
differences
applicable
in
this
case.
He
described
his
experience,
and
the
mining
industry
experience,
in
respect
of
the
"new
mine”
provisions
of
then
existing
subsection
83(5):
the
mining
companies,
in
taking
the
benefit
of
this
legislation,
maximized
their
income
during
the
three-year
period.
This
was
done
in
various
ways,
chiefly
by
valuing
inventory
at
market,
and
by
not
claiming
capital
cost
allowance
or
deduction
for
exploration
and
development
expenses,
all
in
the
three-
year
period.
The
evidence
of
Harrison
on
all
these
matters
was
both
uncontradicted
and
convincing.
I
turn
to
the
"technical"
argument,
put
forward
by
counsel
for
the
plaintiff,
and
the
position
taken
by
counsel
for
the
defendant.
The
legislation,
it
was
said,
permits
three
methods
of
valuing
inventory:
cost,
market,
or
the
lower
of
cost
or
market.
(See
subsection
10(1)
of
the
Act,
and
section
1801
of
the
Regulations.)
The
defendant
does
not
dispute
that
proposition.
A
taxpayer,
it
was
further
said,
is
not
bound,
by
anything
in
the
statute,
to
adhere,
year
to
year,
to
any
one
method
of
valuation
of
inventory.
Reference
was
made
to
former
subsection
14(1)
of
the
"old"
Income
Tax
Act.
If
a
taxpayer,
then,
proposed
to
do,
now,
what
this
taxpayer
asserts:
to
change
his
method
of
valuation
in
a
succeeding
year:
ministerial
concurrence
was
required.
That
subsection
was
repealed
in
1959.
There
was
no
counterpart
at
material
times.
There
is
no
counterpart
now.
The
only
statutory
restric-
tion,
at
the
relevant
times
here,
is
that
opening
inventory
must
be
valued
at
the
same
amount
as
closing
inventory
of
the
previous
year
(subsection
10(2));
but
there
is
no
requirement
that
closing
inventory
be
valued
on
the
same
basis
as
opening
inventory.
In
answer
to
all
that,
the
defendant's
position
was
that
GAAP
requires
consistency;
that
principle
is
implicit
in
the
Income
Tax
Act;
there
should
be
no
change
in
the
method
of
inventory
valuation,
unless
the
new
method
more
properly
or
accurately
reflects
the
taxpayer’s
income
for
the
period
in
question.
I
agree,
generally,
with
the
plaintiff's
contention.
The
change
to
a
market
value
basis
of
valuing
closing
inventory
at
January
31,
1973,
while
it
involves
a
departure
from
the
accounting
principle
of
consistency,
is
a
departure
permitted
by
the
statute.
It
is
an
example,
in
computing
income
for
tax
purposes,
of
a
number
of
instances,
described
by
Harrison,
of
permitted
departures
from
GAAP.
Further,
the
change
sought
by
the
plaintiff
is,
from
an
accounting
point
of
view,
supported
by
the
evidence.
Harrison,
after
consideration
of
the
longterm
contracts
for
the
sale
of
the
concentrates,
testified
the
valuation
of
inventory
at
market,
in
his
view,
results
in
a
more
accurate
measurement
of
the
plaintiff’s
income
in
the
three-year
period.
Again,
that
evidence
was
uncontradicted.
I
accept.
I
go
now
to
what
counsel
for
the
plaintiff
termed
“the
conceptual
proposition".
The
submission
ran
this
way:
The
legislative
intent
in
subsection
83(5)
was
to
exclude,
in
the
computation
of
income,
all
income
derived
from
the
mine,
for
a
fixed
period
of
three
years;
the
three-year
period
has
no
connection
with
the
fiscal
year
of
a
corporate
taxpayer
(except
by
pure
chance);
it
is
based
on
the
date
the
mine
came
into
production;
it
has
nothing
to
do
with
fiscal
or
taxation
years,
or
with
“events"
outside
the
three-year
period;
consistency
of
method
of
inventory
valuation,
as
compared
with
other
periods,
is
not
required;
accounting
principles
may
require
consistency
of
method
from
year
to
year,
but
in
income
tax,
the
focus
is
on
a
single
taxation
year;
in
this
case,
there
is
a
particular
and
peculiar
three-year
period,
unrelated
to
the
usual
taxation
year;
on
the
facts
here,
having
in
mind
the
provisions
of
the
long-term
sales
contracts,
the
most
accurate
way
of
arriving
at
the
real
profit
or
income,
amassed
in
the
total
three-year
period,
was
to
value
inventory
at
market;
all
this
accords
with
the
legislative
intent
to
provide
a
tax
incentive
for
the
development
of
new
mines.
Counsel
for
the
defendant,
in
answer
to
that
submission,
relied
again
on
the
GAAP
consistency
principle.
Even
if
the
Income
Tax
Act
focuses
generally
on
income
for
a
taxation
year,
and
assuming
subsection
83(5)
is
an
exception
directed
to
a
particular
three-year
period,
unconnected
with
fiscal
or
taxation
years,
nevertheless,
it
was
said,
there
must
be
consistency
of
method
in
three
temporal
areas:
the
“pre-exempt
period",
the
“exempt"
period,
and
the
“post-exempt"
period;
otherwise
distortion
of
income
results.
I
do
not
agree.
The
three-year
period,
is,
as
I
see
it,
an
income-earning
period,
for
tax
purposes,
separate
and
apart
from
the
plaintiff's
fiscal
taxation
periods.
The
taxpayer
is
entitled
to
use,
for
that
period,
the
method
of
valuing
inventory
most
appropriate
for
arriving
at
a
true
picture
of
income
in
that
precise
period.
On
the
evidence
in
this
case,
the
valuation
of
inventory
at
market,
is
justified.
The
plaintiff,
as
earlier
recounted,
used
a
cost
basis
(the
lower
of
cost
or
market)
for
its
1973
fiscal
and
taxation
year,
and
again
for
its
1974
year,
as
well
as
for
the
preceding
fiscal
years.
The
defendant
submits
the
consistency
principle
must
be
applied:
if
market
is
appropriate
for
the
three-year
period,
then,
absent
any
reasonable
factual
basis
otherwise,
market
should
be
used
for
all
the
other
periods.
But
again,
the
statute
and
regulations,
to
my
mind,
permit
the
plaintiff
to
compute
its
income
in
the
three-year
period
as
it
proposes.
That
period
is
not,
as
the
defendant
submitted,
inexorably
tied
into
other
fiscal
and
taxation
periods.
A
further
argument
was
put
forward
on
behalf
of
the
defendant.
It
was
submitted
the
plaintiff
is
estopped
from
changing
its
basis
for
inventory
valuation.
This
is
so,
it
was
said,
because
the
proposed
$339,000
increase
in
inventory
as
at
January
31,
1970,
results
in
an
increase
in
income
for
the
period
of
January
1,
1970
to
January
31,
1970;
the
plaintiff
cannot
now
be
reassessed.
There
is,
in
my
view,
no
detriment
to
the
defendant.
The
plaintiff
agrees,
as
does
the
defendant’s
expert
witness
McDonald,
that
the
amount
of
$339,000
must
be
deducted
from
the
sum
of
$2,642,000,
having
a
net
adjustment,
in
respect
of
inventory
of
$2,303,000.
The
appeal
is,
therefore,
allowed.
The
reassessment
of
the
plaintiff’s
income
tax
for
the
year
1974
is
referred
back
to
the
Minister,
with
the
direction
that
the
plaintiff’s
income
for
that
year
be
reduced
by
$2,303,000.
The
plaintiff
is
entitled
to
its
costs.
Appeal
allowed.