Pratte,
J.A.:—This
is
an
appeal
from
a
judgment
of
the
Trial
Division
(Rouleau,
J.)
allowing
an
appeal
by
Her
Majesty
from
a
decision
of
the
Tax
Review
Board
relating
to
a
reassessment
of
the
appellant's
income
tax
for
the
1978
taxation
year.
The
only
issue
on
the
appeal
is
whether
the
Minister
of
National
Revenue
was
right
in
reassessing
the
appellant
on
the
basis
that
it
owed,
in
addition
to
its
income
tax
for
that
year,
a
sum
of
$95,587.32
as
interest
under
section
161
of
the
Income
Tax
Act,
R.S.C.
1952,
c.
148
(am.
S.C.
1970-71-72,
c.
63)
(the
"Act").
Pursuant
to
subparagraph
157(1)(a)(i)
of
that
Act,
the
appellant,
during
its
fiscal
year
ending
on
March
31,
1978,
paid
to
the
Receiver
General
of
Canada,
on
account
of
its
income
tax
for
that
year,
instalments
totalling
$8,916,000.
In
June
1978,
realizing
that
it
had
overestimated
its
tax
liability
for
the
year,
it
made
an
arrangement
with
the
Minister
of
National
Revenue
pursuant
to
which
$2,168,000
of
the
instalments
previously
paid
on
account
of
the
appellant's
1978
income
tax
liability
was
considered
as
instalments
paid
on
account
of
the
1979
income
tax.
At
the
end
of
September
1978,
the
appellant
filed
its
income
tax
return
for
1978
and
then
paid
an
additional
amount
of
$295,587.
By
reassessment,
notice
of
which
was
dated
September
3,1980,
the
Minister
first
determined
that
the
appellant
had,
in
its
1978
return,
underestimated
its
income
tax
by
some
$500,600.
That
determination
is
not
challenged.
The
Minister
also
determined,
and
this
is
the
only
part
of
the
reassessment
that
is
in
issue,
that,
as
a
result
of
the
agreement
of
June
1978,
reallocating
to
the
1979
taxation
year
instalment
payments
that
had
been
made
for
the
1978
taxation
year,
the
appellant
owed
a
sum
of
$95,587.32
as
interest
under
section
161
of
the
Act.
Of
that
sum,
an
amount
of
$11,986.23
was
claimed
under
subsection
161(2),
as
interest
on
the
instalments
that
were
required
to
be
made
before
the
filing
of
the
return;
the
balance
of
$83,601.09
was
claimed
under
subsection
161(1)
as
interest
on
the
balance
of
tax
that
remained
unpaid
on
October
1,
1978,
when
the
time
for
filing
the
appellant's
1978
income
tax
return
expired.
The
appellant
contends
that
it
does
not
owe
any
interest
under
section
161
because
it
in
fact
paid,
before
the
filing
of
its
income
tax
return,
more
than
what
it
was
required
to
pay.
In
support
of
that
contention,
counsel
for
the
appellant
argued
that
the
Minister
did
not
have
the
power
to
enter
into
the
agreement
of
June
1978
and
agree
to
the
reallocation
of
the
1978
instalment;
he
also
stressed
the
fact
that
the
appellant
did
not
have
to
pay
any
income
tax
for
the
1979
taxation
year
and
ultimately
received
a
"nil"
notice
of
assessment
for
that
year.
The
position
of
the
respondent,
which
was
adopted
by
the
trial
judge,
is
that,
under
general
common
law
principles,
the
appellant
could
agree
with
the
Minister
that
some
of
the
instalment
payments
made
for
the
1978
taxation
year
would
be
allocated
to
1979
and
that,
once
that
agreement
had
been
entered
into,
the
situation
was
the
same
as
if
these
instalment
payments
had
originally
been
paid
in
respect
of
the
1979
taxation
year.
The
appellant's
counsel
based
his
contention
that
the
Minister
did
not
have
the
power
to
enter
into
the
agreement
of
June
1978
on
the
fact
that
the
Minister
cannot,
under
section
164,
refund
an
amount
paid
on
account
of
the
tax
before
mailing
the
notice
of
assessment
for
the
year.
This
argument
has
no
merit.
The
reason
why
the
Minister
may
only
refund
an
overpayment
of
tax
in
the
circumstances
described
in
section
164
of
the
Act
is
found
in
section
26
of
the
Financial
Administration
Act,
R.S.C.
1985,
c.
F-11
(formerly
R.S.C.
1970,
c.
F-10,
s.
19),
which
prescribes
that
"no
payment
shall
be
made
out
of
the
Consolidated
Revenue
Fund
without
the
authority
of
Parliament.”
It
is
clear
that
the
agreement
of
June
1978
was
not
a
payment
out
of
the
Consolidated
Revenue
Fund
and
was
not,
therefore,
prohibited
by
that
section.
As
to
the
appellant's
insistence
upon
the
fact
that
it
did
not
owe
any
tax
for
1979,
I
find
it
unwarranted
since,
in
my
view,
that
fact
is
irrelevant.
Under
paragraph
157(1)(a)
of
the
Act,
the
appellant
was
required,
during
its
1979
taxation
year,
to
make
monthly
instalment
payments.
The
only
consequence
of
the
fact
that
the
appellant
later
received
a
"nil"
notice
of
assessment
for
that
year
was
that
it
then
became
entitled
to
a
refund
pursuant
to
section
164.
Did
the
appellant
owe
the
interest
that
was
assessed
against
it?
In
order
to
answer
this
question
it
is
necessary
to
determine
the
effect
of
the
agreement
of
June
1978
and
to
examine
carefully
the
wording
of
section
161
since
it
is
now
well
established
that
the
only
interest
that
may
be
claimed
by
the
Minister
by
way
of
an
assessment
under
the
Income
Tax
Act
is
the
interest
owed
pursuant
to
a
provision
of
the
Act.
(See
Rath
v.
The
Queen,
[1982]
C.T.C.
207;
82
D.T.C.
6175;
Interprovincial
Steel
and
Pipe
Corp.
v.
The
Queen,
[1986]
2
C.T.C.
473;
86
D.T.C.
6583.)
When
the
appellant
paid
the
instalments
of
tax
during
the
1978
taxation
year,
its
tax
liability
was
not
then
extinguished
since
that
tax
liability
did
not
even
exist
at
the
time.
What
the
appellant
did
in
the
1978
taxation
year
was
to
pay
moneys
that
were
to
be
used
to
satisfy
its
income
tax
liability
for
that
year
when
that
liability
would
be
determined.
Its
situation
was
comparable
to
that
of
a
person
who,
expecting
to
owe
something
to
another
on
a
future
date,
pays
that
other
person
a
sum
of
money
on
the
understanding
that
the
sum
so
paid
will
be
used
to
extinguish
the
future
debt
if
and
when
it
arises.
In
that
case,
after
the
payment
has
been
made
the
parties
may,
as
long
as
the
anticipated
debt
does
not
exist,
agree
to
change
the
destination
of
the
payment.
In
making
such
an
agreement,
the
parties
merely
agree
that
a
payment
made
in
the
past
for
a
certain
purpose
and
not
yet
used
for
that
purpose
will
be
used
for
another
purpose.
If
section
161
is
read
with
those
considerations
in
mind,
it
is
impossible
to
avoid
the
conclusion,
in
my
view,
that
the
appellant
did
not
owe
any
interest
under
subsection
161(2)
but
owed
the
interest
claimed
under
subsection
161(1).
Under
subsection
161(2),
interest
may
be
claimed
if
the
taxpayer
has
failed
to
pay
as
required
an
instalment
of
tax
that
he
was
required
to
pay
under
Part
I
of
the
Act.
Did
the
appellant
pay
as
required
the
instalments
that
it
was
required
to
pay?
It
certainly
did.
The
agreement
of
June
1978
allocating
these
instalment
payments
to
another
year
could
not
alter
that
fact
since
a
contract
cannot
have
the
effect
of
modifying
a
past
event.
Under
subsection
161(1),
interest
was
due
by
the
appellant
if
the
amount
paid
by
it
"on
account
of
tax
payable”
for
the
1978
taxation
year
before
October
1,
1978,
was
less
than
the
amount
of
tax
payable
by
it
for
that
year.
The
way
in
which
this
subsection
is
drafted
indicates,
in
my
view,
that
in
order
to
determine
whether
interest
is
payable
one
must
place
oneself
at
the
moment
when
the
time
for
filing
the
tax
return
has
expired.
When
the
instalment
payments
here
in
question
were
made
they
were
to
be
applied
to
the
1978
income
tax
liability.
As
long
as
that
tax
liability
remained
undetermined,
though,
the
parties
could
agree
to
change
the
destination
of
those
payments.
This
is
what
the
appellant
and
the
Minister
did
in
June
1978.
From
the
date
of
that
agreement,
the
instalment
payments,
which
had
not
yet
been
used
to
extinguish
the
1978
tax
liability,
were
to
be
applied
to
discharge
the
1979
tax
liability.
On
October
1,
1978,
therefore,
as
a
consequence
of
the
June
1978
agreement,
the
amount
paid
"on
account"
of
the
1978
income
tax
did
not
include
the
amounts
that
had
originally
been
paid
for
that
purpose
but
had
since
been
allocated
to
the
1979
taxation
year.
I
would
allow
the
appeal
in
part,
set
aside
the
decision
of
the
Trial
Division,
and
refer
the
reassessment
back
to
the
Minister
for
reconsideration
and
reassessment
on
the
basis
that,
for
its
1978
taxation
year,
the
appellant
did
not
owe
interest
under
subsection
161(2)
of
the
Income
Tax
Act.
I
would
not
make
any
order
as
to
costs.
Appeal
allowed
in
part.