Reed,
J:—This
case
raises
a
very
narrow
point
of
law
—
the
proper
interpretation
of
Regulation
1207(2)(a)(ii)
of
the
Income
Tax
Regulations,
SOR/77-731
as
applicable
to
the
1978
taxation
year.
The
regulation
reads
as
follows:
1207.
(1)
A
taxpayer
may
deduct
in
computing
his
income
for
a
taxation
year
such
amount
as
he
may
claim
not
exceeding
the
lesser
of
(a)
his
income
for
the
year,
computed
in
accordance
with
Part
I
of
the
Act,
if
no
deduction
were
allowed
under
this
subsection;
and
(b)
his
frontier
exploration
base
as
of
the
end
of
the
year
(before
making
any
deduction
under
this
subsection
for
the
year).
(2)
For
the
purposes
of
this
section,
“frontier
exploration
base”
of
a
taxpayer
as
of
a
particular
time
means
the
amount
that
is
equal
to
(a)
the
aggregate
of
all
amounts,
each
of
which
is
an
amount
in
respect
of
a
particular
oil
or
gas
well
in
Canada
equal
to
667;
per
cent
of
the
amount
by
which
(i)
expenses
incurred
after
March,
1977
and
before
April,
1980
.
.
.
exceeds
(ii)
the
taxpayer’s
threshold
amount
in
respect
of
the
well,
minus
the
amount
that
would
be
determined
under
subparagraph
(1)
in
respect
of
the
taxpayer
for
the
well
if
the
reference
therein
to
“after
March,
1977
and
before
April,
1980”
were
read
as
“after
June,
1976
and
before
April,
1977”,
.
.
.
[Emphasis
added.]
The
issue
is
whether
subparagraph
(ii)
can
result
in
a
negative
amount.
That
is,
if
the
taxpayer’s
June
1976
to
April
1977
expenses
exceed
the
threshold
amount
($5
million)
does
the
negative
sum
so
arrived
at
become
the
applicable
figure
for
the
purposes
of
subparagraph
(ii)
of
regulation
1207(2)(a),
or
can
that
figure
never
be
lower
than
zero.
The
latter
requires
an
interpretation
of
the
subparagraph
which
sees
it
as
designed
to
allow
the
taxpayer
a
deduction
of
the
threshold
amount
($5
million)
but
no
more
while
the
former
sees
it
as
more
generous
in
nature
and
designed
to
allow
a
deduction
of
all
expenses
actually
incurred.
It
should
perhaps
be
noted
that
the
deduction
allowed
pursuant
to
section
65
of
the
Income
Tax
Act
and
calculated
pursuant
to
Regulation
1207
is
exceptional
in
nature.
While
I
have
referred
to
it
above
as
a
deduction,
counsel
for
the
plaintiff
rightly
pointed
out,
it
is
an
allowance.
It
is
an
allowance
over
and
above
the
normal
deduction
of
expenses
allowed
in
computing
taxable
income.
Its
effect,
in
conjunction
with
other
provisions
of
the
Income
Tax
Act,
can
be
to
allow
a
taxpayer
a
deduction
of
200
per
cent
of
the
expenses
he
actually
incurred.
One
hundred
per
cent
of
the
expenses
are
deducted
in
the
normal
way;
33'/,
per
cent
can
be
deducted
as
earned
depletion
allowance;
and
then
6674,
per
cent
can
be
deducted
as
a
frontier
exploration
allowance
pursuant
to
regulation
1207
and
section
65
of
the
Income
Tax
Act
to
which
it
relates,
(a
“super
depletion
allowance”)
—
and
this
last
can
be
deducted
by
the
taxpayer
from
his
income
from
any
source.
Extrinsic
Evidence
Counsel
for
the
defendant’s
main
argument
in
support
of
his
contention
that
the
subparagraph
should
never
be
allowed
to
result
in
a
sum
less
than
zero
is
based
on
what
is
argued
to
be
the
purpose
of
the
Regulation.
That
purpose,
it
is
argued,
was
expressed
in
statements
made
by
the
Minister
of
Finance
in
announcing
the
new
program.
The
provision
was
brought
into
force
March
31,
1977.
It
is
clear
it
was
designed
as
an
incentive
to
encourage
exploration
for
oil
in
what
are
called
frontier
areas
(ie:
the
drilling
of
high
cost
wells).
A
budget
document
dated
March
31,
1977
and
distributed
by
the
Minister
of
Finance
at
the
time
of
the
announcement
of
the
incentive
program
was
referred
to
in
argument.
It
stated:
In
present
circumstances
a
fuller
knowledge
of
Canada’s
petroleum
and
natural
gas
production
potential
is
essential.
To
date,
however,
there
has
not
been
the
level
of
exploration
activity
in
Canada’s
frontier
areas,
particularly
in
deep
water,
to
provide
this
knowledge.
.
.
.
An
incentive
to
encourage
exploration
in
these
areas
of
Canada
is
appropriate
at
this
time.
Additional
encouragement
will
be
provided
to
taxpayer’s
in
respect
of
drilling
costs
in
excess
of
$5
million
incurred
in
connection
with
an
exploratory
well.
The
well
must
be
located
in
Canada,
including
the
continental
shelf,
and
the
expenses
must
be
incurred
between
March
31,
1977
and
April
1,
1980.
The
incentive
will
take
the
form
of
an
additional
earned
depletion
entitlement
of
667;
per
cent
of
qualifying
drilling
costs.
A
taxpayer
will
be
entitled
to
offset
this
additional
depletion
against
income
from
any
source,
whereas
normal
depletion
is
deductible
only
to
the
extent
of
25
per
cent
of
resource
profits.
.
.
.
Reference
to
this
document
was
objected
to
by
counsel
for
the
plaintiff,
who
relied
particularly
on
the
Supreme
Court
decision
in
The
Attorney
General
of
Canada
v
The
Reader’s
Digest
Association
(Canada)
Ltd,
Sélection
du
Reader’s
Digest
(Canada)
Liée,
[1961]
SCR
775;
[1961]
CTC
530.
The
defendant
on
the
other
hand
relied
on
the
recent
Federal
Court
of
Appeal
decision
in
Edmonton
Liquid
Gas
Limited
v
The
Queen,
[1984]
CTC
536;
84
DTC
6526
dated
September
28,
1984.
In
that
decision
(at
CTC
546;
DTC
6534)
the
Court
quoted
what
was
said
by
the
Minister
of
Finance
in
the
House
of
Commons
Debates
with
respect
to
the
provisions
of
the
Income
Tax
Act
there
in
issue.
I
allowed
counsel
to
refer
to
the
budget
document
relating
to
what
became
Regulation
1207.
It
seems
to
me
that
there
has
been
a
modification
of
the
approach
taken
by
the
courts
since
the
Readers
Digest
case.
I
was
referred
to
the
fact
that
the
Carter
Royal
Commission
on
Taxation
was
quoted
in
International
Nickel
Company
of
Canada
Limited
v
MNR,
[1969]
CTC
106
at
123;
69
DTC
5092
at
5102.
I
am
also
aware
that
extrinsic
material,
including
legislative
debates
and
committee
proceedings,
has
been
relied
upon
in
numerous
cases
as
an
aid
to
statutory
interpretation.
Such
material
has
been
referred
to
either
for
the
purpose
of
providing
the
factual
context
and
general
purpose
of
the
legislation
or
for
more
particular
guidance
with
respect
to
the
specific
provisions
of
the
Act.
Reference
can
be
made
to
an
article
by
Professor
W
H
Charles,
“Extrinsic
Evidence
and
Statutory
Interpretation:
Judicial
Discretion
in
Context”,
(1983)
7
Dal
L
J
7,
for
a
discussion
of
the
recent
jurisprudence
in
this
area.
Also,
it
is
clear
that
opinions
of
the
Department
of
National
Revenue
are
admissible
in
the
form
of
Interpretation
Bulletins
(see
J
Camille
Harel
v
The
Deputy
Minister
of
Revenue
of
the
Province
of
Quebec,
[1978]
1
SCR
851
at
859;
[1977]
CTC
441
at
448;
Gene
A
Nowegijick
v
The
Queen,
[1983]
1
SCR
29
at
37;
[1983]
CTC
20
at
24;
and,
The
Queen
v
Royal
Trust
Corporation
of
Canada,
[1983]
CTC
159
at
165-166;
83
DTC
5172
at
5177).
If
this
is
so
why
should
the
courts
refuse
to
admit
budget
documents
of
the
kind
in
question
here.
Interpretation
Bulletins,
of
course,
are
issued
after
the
legislation
is
enacted
(or
the
regulations
promulgated)
and
for
that
reason
they
may
have
more
weight;
but
in
the
light
of
the
practice
respecting
these
“opinion”
documents
emanating
from
the
Department
of
Revenue
I
find
it
hard
to
conclude
that
the
budget
documents
are
inadmissible
per
se.
The
Supreme
Court
has,
on
at
least
two
occasions
recently,
when
dealing
with
constitutional
cases,
indicated
that
no
absolute
rule
of
inadmissibility
should
be
laid
down
respecting
extrinsic
materials:
Re
The
Residential
Tenancies
Act,
1979,
[1981]
1
SCR
714
at
722
and
Re
Anti-Inflation
Act,
[1976]
2
SCR
373
at
389.
While
normally
there
may
be
more
scope
in
constitutional
cases
for
extrinsic
evidence
to
play
a
relevant
role
(since
the
enquiry
in
those
cases
is
often
addressed
to
the
“pith
and
substance”
of
the
legislation)
it
would
seem
surprising
if
a
different
rule
respecting
the
admissibility
of
evidence,
applied
as
a
matter
of
principle
to
other
types
of
litigation.
This
is
particularly
so
with
respect
to
the
present
case
given
the
recent
Supreme
Court
decision
in
Stubart
Investments
Limited
v
The
Queen,
[1984]
CTC
294
at
316;
84
DTC
6305
at
6323;
(1984)
53
NR
241
at
264.
There
Mr
Justice
Estey
clearly
indicates
that
the
Courts
should
consider
the
purpose
of
the
provisions
of
the
Income
Tax
Act
when
interpreting
them:
.
.
.
Gradually,
the
role
of
the
tax
statute
in
the
community
changed,
as
we
have
seen,
and
the
application
of
strict
construction
to
it
receded.
Courts
today
apply
to
this
statute
the
plain
meaning
rule,
but
in
a
substantive
sense
so
that
if
a
taxpayer
is
within
the
spirit
of
the
charge,
he
may
be
held
liable.
See
Whiteman
and
Wheatcroft,
supra,
at
P
37.
While
not
directing
his
observations
exclusively
to
taxing
statutes,
the
learned
author
of
“Construction
of
Statutes”,
2nd
ed,
(1983)
at
p
87,
E
A
Dreidger,
put
the
modern
rule
succinctly:
Today
there
is
only
one
principle
or
approach,
namely,
the
words
of
an
Act
are
to
be
read
in
their
entire
context
and
in
their
grammatical
and
ordinary
sense
harmoniously
with
the
scheme
of
the
Act,
the
object
of
the
Act,
and
the
intention
of
Parliament.
I
note
that
on
at
least
two
occasions
(in
constitutional
cases)
the
Supreme
Court
has
indicated
that
while
extrinsic
evidence
may
be
admissible
to
ascertain
the
object
of
legislation,
and
thus
indirectly
influence
the
interpretation
of
statutory
provisions,
it
is
not
admissible
for
the
purpose
of
construing
statutory
provisions
directly
(see:
Dickson,
CJC
(dissenting),
Reference
Pursuant
to
Section
27(1)
of
the
Judicature
Act,
SCC
No
18224
of
December
20,
1984
at
19-20;
Estey,
J
in
Morguard
Properties
Ltd
et
al
v
The
City
of
Winnipeg,
[1983]
2
SCR
493
at
498-499.
With
respect
to
the
interpretation
of
regulations,
as
opposed
to
statutes,
it
was
decided
by
Mr
Justice
Disberry
in
Central
Canada
Potash
Co
Ltd
et
al
v
Attorney-General
for
Saskatchewan
et
al
(1975),
57
DLR
(3d)
7
(Sask
QB)
that
even
if
statements
of
members
of
the
government
or
the
legislature
were
not
admissible
to
demonstrate
the
purpose,
object,
or
effect
of
a
statute,
the
rule
was
otherwise
with
respect
to
regulations.
His
reasoning
was
that
regulations
are
made
by
the
Executive
Council,
which
acts
collectively
and
unanimously
in
advising
the
Sovereign,
and
thus
statements
made
by
a
member
of
the
Council
represents
the
views
of
all
its
members,
and
therefore
must
be
relevant
and
admissible.
In
this
case,
the
Minister’s
statement
has
relevance
generally
to
the
issues
involved
and
is
admissible.
It
carries
little
weight,
however,
as
to
whether
or
not
Regulation
1207(2)(a)(ii)
can
result
in
a
negative
amount.
The
lack
of
weight
flows
from
the
fact
that
it
carries
no
details
with
respect
to
the
treatment
to
be
accorded
June
1976
to
April
1977
expenses.
Even
if
it
had
the
weight
such
detail
might
carry
would
be
questionable
because
of
the
ever-present
possibility
that
the
details
of
the
implementation
could
change
between
the
date
of
announcement
of
the
program
and
the
date
of
issuance
of
the
regulation.
Indeed,
in
this
case
the
Minister’s
statement
indicated
that
only
costs
incurred
between
March
31,
1977
and
April
1,
1980
would
be
eligible
for
the
frontier
exploration
allowance.
The
regulation
when
finally
promulgated
took
into
account
expenses
incurred
between
June
1976
and
April
1977
as
well.
Thus,
while
the
Minister’s
statement
has
relevance
generally
to
the
issues
in
this
case
it
cannot
settle
the
very
point
in
issue.
Regulation
1207(2)(a)(ii)
The
Oxford
English
Dictionary
(Clarendon
Press,
1971)
clearly
indicates
that
the
word
“minus”
carries,
at
least,
two
significations:
.
.
.
In
non-technical
use
with
the
deduction
of,
exclusive
of
(some
specified
portion
or
constituent
element
of
the
whole).
cf.
less
.
.
.
used
as
the
oral
equivalent
of
the
symbol
(-)
in
its
algebraical
interpretation
as
forming
with
the
expression
to
which
it
is
prefixed
the
representation
of
a
negative
quantity
eg
in
“-3”,
“-x”,
which
are
read
as
minus
3,
minus
x.
The
first
definition
set
out
above
fits
with
the
defendant’s
arguments
in
this
case;
the
second
fits
with
those
of
the
plaintiff.
The
plaintiffs
main
argument
is
that
Regulation
1207(2)(a)(ii)
prescribes
a
“formula
for
the
calculation”
of
an
allowance
granted
to
the
taxpayer.
As
such
the
plaintiff
argues
there
is
nothing
illogical
in
finding
that
the
allowance
is
to
be
measured
by
reference
to
the
total
June
1976-April
1977
expenses
incurred
drilling
a
high
cost
well,
as
opposed
to
measuring
that
allowance
by
reference
to
a
ceiling
of
$5
million.
The
plaintiff
argues
that
the
$5
million
figure
is
used
to
determine
which
wells
qualify
as
high
cost
wells
—
but
once
that
determination
is
made
all
expenses
incurred
with
respect
to
that
well
were
intended
to
be
eligible
for
the
extra
deduction
(the
allowance).
Since
Regulation
1207(2)(a)(ii)
prescribes
a
“formula
for
the
calculation”
of
the
allowance
the
plaintiff
argues
that
the
word
“minus”
therein
must
carry
its
mathematical
(or
arithmetical)
signification.
Thus
it
is
argued
that
subparagraph
1207(2)(a)(ii)
must
be
interpreted
as
admitting
a
negative
result.
At
my
request
both
counsel
canvassed
other
provisions
of
the
Income
Tax
Act
in
which
the
word
minus
is
found
to
determine
whether
any
pattern
of
usage
was
apparent
which
would
assist
in
interpretation
in
this
case.
In
most
of
those
60
sections
the
calculation
could
not
result
in
a
negative
sum.
This
most
often
clearly
had
to
be
the
case
as
a
result
of
the
context
of
the
section
eg:
in
subsection
112(4.2)
the
words
“a
taxpayer’s
share
of
any
loss”
cannot
be
construed
to
be
a
negative
figure;
in
subparagraph
145(
1
)(c)(iv)
it
makes
no
sense
to
have
a
negative
earned
income;
and
in
subsection
164(7)
it
makes
no
sense
to
have
a
negative
overpayment.
In
four
out
of
the
60
sections
it
may
be
argued
that
a
negative
amount
could
enter
into
the
calculation
—
in
the
context
of
very
unusual
circumstances
—
eg:
under
subparagraph
13(21)(f)(v)
if
the
costs
of
the
disposition
of
a
property
exceeded
the
proceeds
of
the
sale
of
that
property;
see
also
sections
107(2)(c),
107(4)(f)
and
28(1).
I
accept
counsel
for
the
plaintiffs
argument
that
what
is
determined
by
Regulation
1207
is
an
allowance
granted
as
an
incentive
to
drill
high
cost
wells.
I
accept
his
argument
that
it
would
be
equally
consistent
with
this
purpose
for
the
allowance
to
be
calculated
by
reference
to
all
expenses
actually
incurred
as
for
it
to
be
calculated
by
reference
to
a
ceiling
of
five
million.
I
do
not
accept,
however,
that
the
calculation
determined
by
1207(2)(a)(ii)
is
of
such
a
technical
nature
that
one
must
calculate
it
in
accordance
with
mathematical
principles
rather
than
in
accordance
with
the
originary
grammatical
meaning
of
the
words.
“Threshold
amount
minus
expenses”
construed
in
an
ordinary
grammatical
sense
would
not
indicate
to
a
reader
that
a
negative
sum
could
result.
I
am
buttressed
in
this
view
by
the
definition
of
the
word
minus
found
in
the
Oxford
dictionary,
supra.
It
is
there
indicated
that
in
its
non-technical
sense
the
word
minus
means
“with
the
deduction
of
.
.
.
some
constituent
element
of
the
whole”
and
that
its
technical
meaning
is
that
contended
for
by
the
plaintiff.
While
the
Income
Tax
Act
and
regulations
in
many
sections
(section
1207
being
one
of
them),
set
out
formulae
for
the
calculation
of
amounts,
this
is
done
by
the
use
of
concepts
expressed
in
ordinary
language.
The
context
is
not
that
of
a
mathematics
text
book.
Accordingly
I
do
not
think
the
technical
definition
of
the
phrase
“threshold
amount
minus
expenses”
for
which
counsel
for
the
plaintiff
argues
is
the
appropriate
one
in
this
case.
In
addition,
while
I
accept
counsel’s
argument,
as
noted
above,
that
the
allowance
could
logically
have
been
calculated
by
reference
to
total
expenses
as
opposed
to
a
ceiling
of
$5
million,
I
am
of
the
view
that
the
allowance
being
such
as
to
confer
an
extraordinary
benefit
on
the
taxpayer,
it
would
be
appropriate
to
construe
an
ambiguity
in
favour
of
the
Minister.
Accordingly,
for
the
reasons
given
the
plaintiffs
claim
is
dismissed.
Appeal
dismissed.