<PAGE>   1

EXHIBIT NO. 10.1.7.:  ALCAN PENSION PLAN

                           ALCAN PENSION PLAN (CANADA)

                           SCHEDULE OF AMENDMENTS 99-1

As of 1 May 1999, the Alcan Pension Plan (Canada) is amended by adding the
following subsection after subsection 19.5.

19.6      PENSION AUGMENTATION AT 1 MAY 1999

          This pension augmentation consists of two successively applied pension
          augmentations. The first under paragraph 19.6.1 increases smaller
          retirement pensions and deferred retirement pensions according to the
          size of the pension, years of Credited Service under the Plan and date
          of retirement. The second under paragraph 19.6.2 adjusts pensions in
          payment as a function of inflation. The two pension augmentations are
          applied successively, that under paragraph 19.6.1 applied first and
          that under paragraph 19.6.2 applied second.

          19.6.1    AUGMENTATION OF SMALLER PENSIONS

                    19.6.1.1  The retirement pension of a Member aged 65 before
                              1 April 1999, who either retired before 1 November
                              1998 or terminated employment before 1 November
                              1998 and retired before 2 May 1999, shall be
                              augmented on 1 May 1999, as applicable, in
                              accordance with subparagraph 19.6.1.9.

                    19.6.1.2  The retirement pension of a Member aged less than
                              65 on 1 April 1999, who either retired before 1
                              November 1998 or terminated employment before 1
                              November 1998 and retired before 2 May 1999, shall
                              be augmented on 1 May 1999, as applicable, in
                              accordance with subparagraph 19.6.1.10.

                    19.6.1.3  The pension in payment of a surviving Spouse and
                              the Spouse's pension payment guarantee connected
                              to the retirement pension referred to in
                              subparagraphs 19.6.1.1 and 19.6.1.2, shall be
                              augmented on 1 May 1999, as applicable, in
                              accordance with subparagraph 19.6.1.11.

                    19.6.1.4  The deferred retirement pension of a Member who
                              terminated employment before 1 November 1998,
                              including the pension payable under any attached
                              elected pension


                                       1

<PAGE>   2
                              payment guarantee, shall be augmented on 1 May
                              1999, as applicable, in accordance with
                              subparagraph 19.6.1.12.

                    19.6.1.5  The retirement pension of a Member who at his
                              Commencement Date has less than 100% of the
                              Company's contributions to his retirement income
                              vested but who has 10 years or more of Credited
                              Service shall be augmented on 1 September 1999 in
                              accordance with subparagraph 19.6.1.13 only and
                              not under any of subparagraphs 19.6.1.9,
                              19.6.1.10, 19.6.1.11 and 19.6.1.12.

                    19.6.1.6  Notwithstanding the preceding, this augmentation
                              under paragraph 19.6.1 shall not apply to a Member
                              nor to the Spouse of such Member who immediately
                              before his retirement or termination of employment
                              was a Suspended Member as a result of a transfer
                              to another pension plan sponsored by the Company,
                              an Affiliated Company or a Predecessor Company.

                    19.6.1.7  For the purposes of paragraph 19.6.1 only, the
                              following expressions shall have the meaning set
                              out below:

                              "Commencement Date" means in the case of a Member,
                              the earliest of such Member's retirement date,
                              date of disability and date of termination of
                              service and, in the case of a pre-retirement
                              surviving Spouse's pension, the first of the month
                              following the Member's date of death.

                              "Monthly Pension Amount" means the monthly
                              equivalent of the pension referred to in any of
                              subparagraphs 19.6.1.1, 19.6.1.2, 19.6.1.3,
                              19.6.1.4 and 19.6.1.5.

                              "Total Monthly Pension Amount" means the Monthly
                              Pension Amount of a Member plus the monthly
                              equivalent of any other pension, benefit of a
                              pension or income nature, or any payment required
                              by law on termination of service which payment is,
                              in the opinion of the Company, compensation
                              related to service with the Company, an Affiliated
                              Company or a Predecessor Company which the Member
                              is receiving, has received, or may expect to
                              receive in respect of Credited Past Service
                              granted under subsections 4.03(a) and 4.03(b).

                              "Adjusted Total Monthly Pension Amount" means the
                              Total Monthly Pension Amount excluding that
                              portion which ceases to be paid after age 65 or
                              means the Total Monthly

                                       2
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                              Pension Amount at Normal Retirement Date in the
                              case of a deferred retirement pension.

                    19.6.1.8  In the case where a Member's pension referred to
                              in any of subparagraphs 19.6.1.1, 19.6.1.2,
                              19.6.1.3, 19.6.1.4 and 19.6.1.5 has been revalued
                              because of marital breakdown, Monthly Pension
                              Amount, Total Monthly Pension Amount and Adjusted
                              Total Monthly Pension Amount shall be determined
                              on 1 May 1999 as if such revaluation had not
                              occurred.

                    19.6.1.9  In regard to subparagraph 19.6.1.1, the monthly
                              amount of the augmentation  is determined by the
                              formula:

                              the lesser of

                              (i)       $1 x A x (0.4 + B) x Credited Service

                              and

                              (ii)      $1,250.00 - Total Monthly Pension
                                        Amount, which result cannot be less than
                                        zero

                              where

                              "A" equals the greater of

                              (i)       30 - MPC,
                                        --------
                                           2

                                        which result cannot be less than zero

                              and

                              (ii)      2 x (40 - greater of MPC and 30),
                                        --------------------------------
                                                       10
                                        which result cannot be less than zero

                              "B" equals the lesser of

                              (i)       .0025 x number of complete months by
                                        which the Commencement Date precedes 1
                                        January 1995

                              and

                                       3
<PAGE>   4
                              (ii)      0.6

                              "MPC" is determined as follows:

                              Total Monthly Pension Amount
                              ----------------------------
                                     Credited Service

                    19.6.1.10 In regard to subparagraph 19.6.1.2, the monthly
                              amount of the augmentation is determined by the
                              formula:

                              the lesser of A and B

                              where

                              "A" equals

                              $17,000.00 - the sum of the Total Monthly Pension
                                           Amount expected to be paid for 1999
                                           before this augmentation
                                           ---------------------------------- ,
                                                         24

                                           which result cannot be less than zero

                              "B" equals

                              C  + (C  - C ) x (1.0 - (0.6 x the number of
                               1     2    1            complete months by which
                                                       1 May 1999 precedes the
                                                       first of the month
                                                       following the Normal
                                                       retirement Date))

                              "C "  equals the amount determined by the formula
                                1   in subparagraph 19.6.1.9

                              "C "  equals the amount determined by the formula
                                2   in subparagraph 19.6.1.9 except that

                              "MPC" is determined as follows:

                              Adjusted Total Monthly Pension Amount
                             --------------------------------------
                                        Credited Service


                                       4
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                              and Total Monthly Pension Amount is replaced by
                              Adjusted Total Monthly Pension Amount.

                    19.6.1.11 In regard to subparagraph 19.6.1.3, the monthly
                              amount of the augmentation is determined by the
                              formula:

                              the lesser of

                              (i)       $1 x A x (0.4 + B) x Credited Service

                              and

                              (ii)      $1,250.00 - Total Monthly Pension
                                        Amount, which result cannot be less
                                        than zero.

                              where

                              "A" equals the greater of

                              (i)       18 - MPC,
                                        --------
                                           2

                                        which result cannot be less than zero

                              and

                              (ii)      2 x (24 - greater of MPC and 18),
                                        --------------------------------
                                                       6
                                        which result cannot be less than zero

                              "B" equals the lesser of

                              (i)       .0025 x number of complete months by
                                        which the Commencement Date precedes
                                        1 January 1995

                              and

                              (ii)      0.6

                              "MPC" is determined as follows:

                              Total Monthly Pension Amount
                              ----------------------------
                                    Credited Service

                                       5
<PAGE>   6
                   19.6.1.12 In regard to subparagraph 19.6.1.4,
                             the augmentation factor equals the amount
                             determined by the formula in subparagraph 19.6.1.9
                             divided by the Monthly Pension Amount, and the
                             monthly amount of the augmentation on the date of
                             calculation equals the amount obtained when the
                             augmentation factor is applied to the Monthly
                             Pension Amount.

                   19.6.1.13 In regard to subparagraph 19.6.1.5,
                             the monthly amount of the augmentation is equal to
                             $100.00.

         19.6.2    COST OF LIVING AUGMENTATION

                    19.6.2.1 The retirement pension, the deferred
                             retirement pension and the Disability Pension of a
                             Member who has retired, terminated his employment
                             or became disabled as the case may be, before 2
                             October 1998, including the pension payable under
                             any attached elected pension payment guarantee,
                             either contingent or in payment, and the pension,
                             either deferred or in payment, to a surviving
                             spouse, shall be augmented on 1 May 1999.

                             Notwithstanding the preceding, this cost of living
                             augmentation under paragraph 19.6.2 is not
                             applicable if a Member at his Commencement Date has
                             less than 100% of the Company's contributions to
                             his retirement income vested.

                    19.6.2.2 For the purposes of this paragraph
                             19.6.2 only, the following expressions shall have
                             the meanings set out below:

                             "Commencement Date" means in the case of a Member,
                             the earliest of such Member's retirement date, the
                             date he became disabled and the date of termination
                             of service and, in the case of a pre-retirement
                             surviving spouse's pension, the first of the month
                             following the Member's date of death.

                             "Monthly Pension Amount" means the monthly
                             equivalent of the pension referred to in
                             subparagraph 19.6.2.1 less, in the case where the
                             pension commenced between 1 April 1975 and 1
                             January 1976 inclusively or in the case where the
                             termination date was before 1 February 1976, any
                             increase paid under the provisions of the
                             Government Annuity Improvement Act, Chapter 83,
                             Statutes of Canada 1974-75-76.

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<PAGE>   7
                    19.6.2.3  The augmentation factors are the following:

                              "Canadian Augmentation Factor" equals

                              (A)       in respect of a Member whose
                                        Commencement Date falls after 1 April
                                        1998 but before 2 October 1998, 0.5%;

                              (B)       in respect of a Member whose
                                        Commencement Date falls after 1
                                        September 1997 but before 2 April 1998,
                                        the lesser of

                                        (i)       0.6% plus the amount obtained
                                                  when 0.1% is multiplied by the
                                                  number of complete months that
                                                  the Commencement Date precedes
                                                  1 April 1998

                                        and

                                        (ii)      1.0%;

                              (C)       in respect of a Member whose
                                        Commencement Date falls after 1
                                        September 1996 but before 2 September
                                        1997, the lesser of

                                        (i)       1.0% plus the amount obtained
                                                  when 0.1% is multiplied by the
                                                  number of complete months that
                                                  the Commencement Date precedes
                                                  1 October 1997

                                        and

                                        (ii)   2.0%;

                              (D)       in respect of a Member whose
                                        Commencement Date falls before 2
                                        September 1996, 1.0%;

                              "American Augmentation Factor" equals

                              (A)       in respect of a Member whose
                                        Commencement Date falls after 1
                                        September 1996 but before 2 October
                                        1998, 1.7%;

                              (B)       in respect of a Member whose
                                        Commencement Date falls before 2
                                        September 1996, 1.4%;

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<PAGE>   8
                              "British Augmentation Factor" equals

                              (A)       in respect of a Member whose
                                        Commencement Date falls after 1
                                        September 1996 but before 2 October
                                        1998, 5.0%;

                              (B)       in respect of a Member whose
                                        Commencement Date falls before 2
                                        September 1996, 3.6%;

                              "Swiss Augmentation Factor" equals nil.

                              "German Augmentation Factor" equals

                              (A)       in respect of a Member whose
                                        Commencement Date falls before 2 October
                                        1998, 1.0%;

                              "French Augmentation Factor" equals

                              (A)       in respect of a Member whose
                                        Commencement Date falls before 2 October
                                        1998, 0.8%;

                              "Japanese Augmentation Factor" equals

                              (A)       in respect of a Member whose
                                        Commencement Date falls before 2 October
                                        1998, 1.1%;

                    19.6.2.4  Other than as provided for in subparagraph
                              19.6.2.5, the monthly amount of the augmentation
                              on the date of calculation is equal to the amount
                              obtained when the Canadian Augmentation Factor is
                              applied to the Monthly Pension Amount.

                    19.6.2.5  If the Monthly Pension Amount is paid in a
                              currency other than in Canadian dollars at a fixed
                              rate of exchange, the monthly amount of the
                              augmentation is equal to:

                              (A)       in respect of a Monthly Pension Amount
                                        paid in United States Dollars, the
                                        amount obtained when the American
                                        Augmentation Factor is applied to the
                                        Monthly Pension Amount;

                              (B)       in respect of a Monthly Pension Amount
                                        paid in Pounds Sterling, the amount
                                        obtained when the British Augmentation
                                        Factor is applied to the Monthly Pension
                                        Amount;

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<PAGE>   9
                             (C)       in respect of a Member's Monthly Pension
                                       Amount paid in Swiss Francs, the amount
                                       obtained when the Swiss Augmentation
                                       Factor is applied to the Monthly Pension
                                       Amount;

                             (D)       in respect of a Member's Monthly Pension
                                       Amount paid in German Marks, the amount
                                       obtained when the German Augmentation
                                       Factor is applied to the Monthly Pension
                                       Amount;

                             (E)       in respect of a Member's Monthly Pension
                                       Amount paid in French Francs, the amount
                                       obtained when the French Augmentation
                                       Factor is applied to the Monthly Pension
                                       Amount.

                             (F)       in respect of a Member's Monthly Pension
                                       Amount paid in Japanese Yen, the amount
                                       obtained when the Japanese Augmentation
                                       Factor is applied to the Monthly Pension
                                       Amount.

                   19.6.2.6  The retirement pension of a Member, who retires on
                             or after 1 May 1999 and who immediately prior to
                             such retirement was in receipt of an Approved
                             Disability Benefit, shall be augmented from his
                             retirement date by the same augmentation percentage
                             that would otherwise have applied to his retirement
                             pension had his date of disability been his
                             Commencement Date for the purpose of calculating
                             such augmentation.

         19.6.3    The compounded augmentation factor under this and any
                   previous pension augmentation, shall, unless it is an
                   integral number of tenths of 1%, be rounded to the next
                   higher multiple of 0.1%.

         19.6.4    The compounded augmentation factor under this and any
                   previous pension augmentation granted from Pension
                   Commencement Date, multiplied by the retirement pension
                   payable for a particular month on or after the effective date
                   of this augmentation, plus any other pension increase which
                   may have been granted in previous schedules of amendments,
                   cannot exceed the maximum pension augmented with increases of
                   the Consumer Price Index as determined by Revenue Rules.

                                       9
<PAGE>   10


                           ALCAN PENSION PLAN (CANADA)

                           SCHEDULE OF AMENDMENTS 99-2

Effective 1 October 1999, the Plan is amended by inserting the following
Annex D:

                                     ANNEX D

                               BUY-BACK PROVISIONS

D.1       The Administrator may establish as Credited Past Service of a
          Contributing Member who was not offered a second option to buyback
          either under the Plan or under a plan whose credited service is
          recognized as Credited Past Service under paragraphs 4.03(a) or
          4.03(b) and

          (a)       who, at the time of his election to buyback, is reported as
                    being in active employment with a Participating Company at
                    any point in time between 1 January 1999 and 31 December
                    1999, or

          (b)       who is, after 31 December 1999, returning to active
                    employment from an authorized leave of absence,

          that portion of the current period of employment with the Company, its
          Affiliated Companies or with a Predecessor Company that would have
          been credited to him prior to January 1990 if on the date he became an
          Employee, he had been declared eligible to the Plan or such other plan
          whose credited service is recognized as Credited Past Service under
          paragraph 4.03(a) or 4.03(b), subject to the conditions and
          limitations set out below.

<PAGE>   11
D.2       Such period of employment shall be established as Credited Past
          Service subject to the following conditions:

          (a)       prior to 31 December 1999 or within three months of
                    returning to active employment from an authorized leave of
                    absence, the Member contributes to the Plan, in a lump sum,
                    an amount equal to the contribution required at the first
                    time an option to buyback was offered to him plus interest
                    at the rate equal to such rate credited on Member
                    contributions during the interim period;

          (b)       the period of employment being so credited under these
                    provisions shall not exceed one year less any Credited
                    Service granted under similar provisions of the Plan prior
                    to 1 January 1990 or of a plan of an Affiliated Company or
                    Predecessor Company;

          (c)       the lump sum shall be prorated if the period of employment
                    to be credited is less than twelve months;

          (d)       the Credited Service inclusive of the period of employment
                    being credited under this provision shall not exceed
                    Continuous Service;

          (e)       the Credited Service prior to 1 January 1990 inclusive of
                    the period of employment being credited under this
                    subsection shall be limited to 35 years for the purpose of
                    calculating the retirement pension. Where such limitation
                    applies, the lump sum shall be further prorated by the
                    number of months required to reach 35 years of Credited
                    Service prior to 1 January 1990.

<PAGE>   12


                          ALCAN PENSION PLAN (CANADA)

                          SCHEDULE OF AMENDMENTS 00-1

1.       The following definition is added to Section 2:

         "2.09.1   "CAW Member" means a Member who in addition is a member of
                   CAW Local 2301 and who is not in receipt of an Approved
                   Disability Benefit at 1 July 2000 unless he returns to work
                   after that date."

2.       Subsection 2.38 is amended by inserting immediately after the words
         "opposite sex" the words "or the same sex".

3.       The second paragraph of subsection 5.01 is amended by replacing the
         first word of the paragraph by the word "the", by inserting at the
         beginning of the paragraph the words "Other than for a CAW Member," and
         by adding at the end of the paragraph the sentence "For a CAW Member,
         the amount shall be determined with reference to a pay period and
         calculated as described in subsection E.2 of Annex E."

4.       The first paragraph of Section 7 is amended by replacing the first word
         of the paragraph by the word "the", by inserting at the beginning of
         the paragraph the words "Other than for a CAW Member," and by adding at
         the end of the paragraph the sentence "For a CAW Member, the retirement
         pension shall be calculated as described in subsection E.3 of Annex E."

5.       Paragraph 8.02(b) is amended by adding at the end of the paragraph the
         sentence "For the case of a CAW Member, the above early retirement
         factor is modified as described in subsection E.4 of Annex E."

6.       Annex B is amended by replacing "Alcan Adminco Inc." by "Alcan Adminco
         (2000) Inc."

7.       Schedule of Amendment 98-1 in respect of the Reciprocal Transfer
         Agreement made as of 9 June 1997 between Alcan Adminco Inc. and
         1087509 Ontario Inc./Gentek Building Products is abrogated.

                                       1
<PAGE>   13
8.        The following Annex E is added:


                                    ANNEX E

                                  CAW MEMBERS

The provisions of this Annex apply only to a CAW Member and supersede any
corresponding provisions provided elsewhere in the Plan.

E.1       In this Annex, unless the context clearly indicates otherwise, the
          following terms shall have the following meanings:

          "Adjusted YMPE" means an amount equal to the average YMPE over the
          current Plan Year and the previous two consecutive Plan Years.

          "Equivalent Earnings" means, in relation to a CAW Member's job class
          and group for a pay period, an amount determined as follows:

          if 12 times his Pension Multiplier is less than 1.15% of the Adjusted
          YMPE

                    90% of 12 x Pension Multiplier
                    ----
                    1.15%

          and, if 12 times his Pension Multiplier is equal to or greater than
          1.15% of the Adjusted YMPE

                    90% of  [12 x Pension Multiplier + 0.55% of Adjusted YMPE]
                    ---
                    1.7%

          "Highest Average Pension Multiplier" means an amount equal to the
          average of the Pension Multipliers of a CAW Member during those 36
          consecutive months of service within the 60 months of service
          immediately prior to his Date of Determination or the date he became
          entitled to an Approved Disability Benefit, as the case maybe, for
          which the average was greatest. In the case of a CAW Member who does
          not have 36 consecutive months of service, Highest Average Pension
          Multiplier means an amount determined by the Administrator on an
          equitable basis that is consistent, so far as practicable, with the
          basis otherwise applicable.

          "Pension Multiplier" means, in relation to a CAW Member's job class
          and group for a pay period, the multiplier set out in the table below
          in effect at the earlier of his Date of Determination or the date he
          became entitled to an Approved Disability Benefit. For the purpose of
          determining his Equivalent Earnings, Pension Multiplier means, in
          relation to a CAW Member's job class and group for

                                       2
<PAGE>   14
          a pay period, the multiplier set out in the table below in effect on
          the last day of such pay period.



<TABLE>
<CAPTION>

     Group        Job                               Pension Multiplier (effective date: D/M/Y)
                  Class            ----------------------------------------------------------------------------------
                                         To        From             From             From            From
                                      31/12/01     01/01/02         01/01/03         01/01/04        01/01/05
     ------------ ---------------- --------------- ---------------- ---------------- --------------- ----------------
<S>               <C>              <C>             <C>              <C>              <C>             <C>
     N *               -           $40.60          $41.30           $42.00           $43.40          $44.80
     1              9-15           $58.00          $59.00           $60.00           $62.00          $64.00
     2             16-20           $63.00          $64.00           $65.10           $67.00          $69.20
     3             21-24           $70.00          $71.00           $72.40           $74.40          $76.80
     4            Trades           $73.00          $75.00           $75.50           $77.60          $80.10
     5 *          Trades           $76.00          $78.00           $78.50           $80.60          $83.10
     6 *          Trades           $81.00          $83.00           $83.50           $85.60          $88.10
     7 *          Trades           $88.00          $90.00           $90.50           $92.60          $95.10
</TABLE>

         *N:      CAW Members who work at the Nechako Lodge.

          5:      CAW Members in Group 4 who work on 12-hour shifts (rotating or
                  day shift) or in Kemano.

          6:      CAW Members in Group 4 who are live filed as a gangleader
                  (G1/G2/G3) working on 12-hour day shift (A37).

          7:      CAW Members in Group 4 who are live filed as a gangleader
                  (G2/G3) second-class power engineers.

E.2      The amount of Member Contributions payable by a CAW Member for a pay
         period in respect of a Plan Year shall be equal to:

         (i)      1.7% of his Equivalent Earnings up to the YMPE

                  plus

         (ii)     3 1/3% of his Equivalent Earnings in excess of the YMPE

                  divided

         (iii)    by the number of pay periods in that Plan Year

                  and

         (iv)     in the event that the CAW Member's scheduled employment for a
                  Plan Year is less than the number of hours required for
                  full-time employment, his Member Contributions shall be
                  adjusted for that period of employment on a pro-rata basis as
                  determined by the Administrator.

                                       3
<PAGE>   15
E.3      The annual amount of retirement pension as of a CAW Member's Date of
         Determination shall be equal to:

         (i)       Highest Average Pension Multiplier

                   times

                   12

                   times

                   Credited Service limited to 35 years in respect of Credited
                   Service earned prior to 1 January 1990

                   less

                   any other pension, benefit of a pension or income nature, or
                   any payment required by law on termination of service which
                   payment is, in the opinion of the Company, compensation
                   related to service with the Company, an Affiliated Company or
                   a Predecessor Company, payable to such CAW Member primarily
                   in his own right that he is receiving, has received, or may
                   expect to receive in respect of Credited Past Service granted
                   under subsections 4.03(a) and 4.03(b),

         (ii)      subject to a minimum retirement pension for a CAW Member who
                   was a CAW Member at July 1, 2000 equal to the sum of (a) and
                   (b) below:

                   (a)       the retirement pension determined at 1 July 2000,
                             in respect of Credited Service to such date and
                             Highest Average Earnings at 25 June 2000, in
                             accordance with Section 7 applied without reference
                             to subsection 7.04

                   (b)       Highest Average Pension Multiplier

                             times

                             12

                             times

                             Credited Service after 30 June 2000,

                                       4
<PAGE>   16
         (iii)     subject to a minimum retirement pension determined as
                   follows:

                   Highest Average Pension Multiplier

                   times

                   12

                   times

                   Credited Plan Service,

         (iv)      revalued in case of marital breakdown as in subsection 7.04.

E.4      The early retirement factor of a CAW Member is increased to 100% if at
         his Early Retirement Date either

         (i)       his Number of Points equals 85 or more and he has attained
                   age 55, or

         (ii)      his Number of Points equals 75 or more and he has attained
                   age 60.

E.5      The transfer of a CAW Member such that he ceases to be a CAW Member but
         continues to be a Member and the transfer of a Member such that he
         becomes a CAW Member shall be governed by subsection 4.05 adapted as
         required by the Administrator on an equitable and consistent basis.

The above amendments are effective from 1 July 2000 except for item 6 which is
effective from 1 January 2000.

                                       5
<PAGE>   17


                          ALCAN PENSION PLAN (CANADA)

                          SCHEDULE OF AMENDMENTS 00-2

As of 1 October 2000, the Alcan Pension Plan (Canada) is amended by adding the
following subsection after subsection 19.6.

19.7     PENSION AUGMENTATION AT 1 OCTOBER 2000

          19.7.1    The retirement pension, the deferred retirement pension and
                    the Disability Pension of a Member who has retired,
                    terminated his employment or became disabled as the case may
                    be, before 2 April 2000, including the pension payable under
                    any attached elected pension payment guarantee, either
                    contingent or in payment, and the pension, either deferred
                    or in payment, to a surviving spouse, shall be augmented on
                    1 October 2000.

                    Notwithstanding the preceding, this pension augmentation is
                    not applicable if a Member at his Commencement Date has less
                    than 100% of the Company's contributions to his retirement
                    income vested and has less than 10 years of Credited
                    Service.

          19.7.2    For the purposes of this subsection 19.7 only, the following
                    expressions shall have the meanings set out below:

                    "Commencement Date" means the earliest of a Member's
                    Retirement Date, date the Disability Pension commenced and
                    date of termination of employment. In the case of a
                    pre-retirement surviving spouse's

                                       1
<PAGE>   18
                    pension, Commencement Date means the first of the month
                    following the Member's date of death.

                    "Monthly Pension Amount" means the monthly equivalent of the
                    pension referred to in paragraph 19.7.1 less, in the case
                    where the pension commenced between 1 April 1975 and 1
                    January 1976 inclusively or in the case where the
                    termination date was before 1 February 1976, any increase
                    paid under the provisions of the Government Annuity
                    Improvement Act, Chapter 83, Statutes of Canada 1974-75-76.

                    "Adjusted Monthly Pension Amount" means the Monthly Pension
                    Amount payable at 1 October 2000, excluding that portion
                    which ceases to be paid at age 65, or payable at normal
                    retirement date in the case of a deferred pension.

          19.7.3    The augmentation factors are the following:

                    "Canadian Augmentation Factor (I)" equals

                    (A)       in respect of a Member whose Commencement Date
                              falls after 1 April 1999 but before 2 April 2000,
                              1.0% plus the amount obtained when 0.1% is
                              multiplied by the number of complete months that
                              the Commencement Date precedes 1 April 2000;

                    (B)       in respect of a Member whose Commencement Date
                              falls after 1 October 1998 but before 2 April
                              1999, 2.2% plus the amount obtained when 0.1% is
                              multiplied by the number of complete months that
                              the Commencement Date precedes 1 April 1999;

                                       2
<PAGE>   19

                    (C)       in respect of a Member whose Commencement Date
                              falls before 2 October 1998, 2.2%.

                    "Canadian Augmentation Factor (II)" equals

                    (A)       in respect of a Member whose Commencement Date
                              falls after 1 April 1999 but before 2 April 2000,
                              0.8% plus the amount obtained when 0.05% is
                              multiplied by the number of complete months that
                              the Commencement date precedes 1 April 2000;

                    (B)       in respect of a Member whose Commencement Date
                              falls after 1 October 1998 but before 2 April
                              1999, 1.4% plus the amount obtained when 0.1% is
                              multiplied by the number of complete months that
                              the Commencement Date precedes 1 April 1999;

                    (C)       in respect of a Member whose Commencement Date
                              falls before 2 October 1998, 1.4%.

                    "Adjusted Canadian Augmentation Factor" equals

                    Canadian Augmentation Factor (I) x A
                                     +
                    Canadian Augmentation Factor (II) x B
                    -------------------------------------
                       Adjusted Monthly Pension Amount

                    where A equals the lesser of

                    (i)       Adjusted Monthly Pension Amount

                    and

                                       3
<PAGE>   20

                    (ii)      $9,333.33

                    where B equals the amount, if any, that the Adjusted Monthly
                    Pension exceeds $9,333.33.

                    "American Augmentation Factor" equals, in respect of a
                    Member whose Commencement Date falls before 2 April 2000,
                    2.8%.

                    "Adjusted American Augmentation Factor" equals

                    American Augmentation Factor x A + 1.5% x B
                    -------------------------------------------
                           Adjusted Monthly Pension Amount

                    where A equals the lesser of

                    (i)       the Adjusted Monthly Pension Amount

                    and

                    (ii)      US $6,166.67,

                    where B equals the amount, if any, that the Adjusted Monthly
                    Pension Amount exceeds US $6,166.67.

                    "British Augmentation Factor" equals, in respect of a Member
                    whose commencement Date falls before 2 April 2000, 2.0%.

                    "Adjusted British Augmentation Factor" equals

                    British Augmentation Factor x A + 0.3% x B
                    ------------------------------------------
                          Adjusted Monthly Pension Amount

                                       4
<PAGE>   21
                    where A equals the lesser of

                    (i)       the Adjusted Monthly Pension Amount

                    and

                    (ii)      (pound)4,250.00,

                    where B equals the amount, if any, that the Adjusted Monthly
                    Pension Amount exceeds (pound) 4,250.00.

                    "Swiss Augmentation Factor" equals, in respect of a Member
                    whose commencement Date falls before 2 April 2000, 1.2%.

                    "Adjusted Swiss Augmentation Factor" equals

                    Swiss Augmentation Factor x A + 0,8% x B
                    ----------------------------------------
                         Adjusted Monthly Pension Amount

                    where A equals the lesser of

                    (i)       the Adjusted Monthly Pension Amount

                    and

                    (iii)     SF 10,666.67,

                    where B equals the amount, if any, that the Adjusted Monthly
                    Pension Amount exceeds SF 10,666.67.

                                       5
<PAGE>   22
                    "German Augmentation Factor" equals, in respect of a Member
                    whose Commencement Date falls before 2 April 2000, 1.0%.

                    "Adjusted German Augmentation Factor" equals

                    German Augmentation Factor x A + 0.5% x B
                    -----------------------------------------
                         Adjusted Monthly Pension Amount

                    where A equals the lesser of

                    (i)      the Adjusted Monthly Pension Amount

                    and

                    (ii)     DM 13,333.33,

                    where B equals the amount, if any, that the Adjusted Monthly
                    Pension Amount exceeds DM 13,333.33.

                    "French Augmentation Factor" equals, in respect of a Member
                    whose Commencement Date falls before 2 April 2000, 0.9%.

                    "Adjusted French Augmentation Factor" equals

                    French Augmentation Factor x A + 0.3% x B
                    -----------------------------------------
                         Adjusted Monthly Pension Amount

                    where A equals the lesser of

                    (i)      the Adjusted Monthly Pension Amount

                                       6
<PAGE>   23
                    and

                    (ii)     FF 44,583.33,

                    where B equals the amount, if any, that the Adjusted Monthly
                    Pension Amount exceeds FF 44,583.33.

                    "Japanese Augmentation Factor" equals nil.

                    "Adjusted Japanese Augmentation Factor" equals nil.

                    "European Augmentation Factor" equals, in respect of a
                    Member whose Commencement Date falls before 2 April 2000,
                    1.3%.

                    "Adjusted European Augmentation Factor" equals

                    European Augmentation Factor x A + 0.9% x B
                    -------------------------------------------
                          Adjusted Monthly Pension Amount

                    where A equals the lesser of

                    (i)      Adjusted Monthly Pension Amount

                    and

                    (ii)     E 6,833.33,

                    where B equals the amount, if any, that the Adjusted Monthly
                    Pension Amount exceeds E 6,833.33.

                                       7
<PAGE>   24
          19.7.4    Other than as provided for in paragraph 19.7.5, the monthly
                    amount of the augmentation on the date of calculation is
                    equal to the amount obtained when the Adjusted Canadian
                    Augmentation Factor is applied to the Monthly Pension
                    Amount.

          19.7.5    If the Monthly Pension Amount is paid in a currency
                    other than in Canadian dollars at a fixed rate of exchange,
                    the monthly amount of the augmentation is equal to:

                    (A)       in respect of a Monthly Pension Amount paid in
                              United States Dollars, the amount obtained when
                              the Adjusted American Augmentation Factor is
                              applied to the Monthly Pension Amount;

                    (B)       in respect of a Monthly Pension Amount paid in
                              Pounds Sterling, the amount obtained when the
                              Adjusted British Augmentation Factor is applied to
                              the Monthly Pension Amount;

                    (C)       in respect of a Member's Monthly Pension Amount
                              paid in Swiss Francs, the amount obtained when the
                              Adjusted Swiss Augmentation Factor is applied to
                              the Monthly Pension Amount;

                    (D)       in respect of a Member's Monthly Pension Amount
                              paid in German Marks, the amount obtained when the
                              Adjusted German Augmentation Factor is applied to
                              the Monthly Pension Amount;

                                       8
<PAGE>   25
                    (E)       in respect of a Member's Monthly Pension Amount
                              paid in French Francs, the amount obtained when
                              the Adjusted French Augmentation Factor is applied
                              to the Monthly Pension Amount;

                    (F)       in respect of a Member's Monthly Pension Amount
                              paid in Japanese Yen, the amount obtained when the
                              Adjusted Japanese Augmentation Factor is applied
                              to the Monthly Pension Amount;

                    (G)       in respect of a Member's Monthly Pension Amount
                              paid in Euros, the amount obtained when the
                              Adjusted European Augmentation Factor is applied
                              to the Monthly Pension Amount.

          19.7.6    The compounded augmentation factor under this and any
                    previous pension augmentation, shall, unless it is an
                    integral number of tenths of 1%, be rounded to the next
                    higher multiple of 0.1%.

          19.7.7    The retirement pension of a Member, who retires on or after
                    1 October 2000 and who immediately prior to such retirement
                    was in receipt of an Approved Disability Benefit, shall be
                    augmented from his retirement date by the same augmentation
                    percentage that would otherwise have applied to his
                    retirement pension had his date of disability been his
                    Commencement Date for the purpose of calculating such
                    augmentation.

          19.7.8    The compounded augmentation factor under this and any
                    previous pension augmentation granted from Pension
                    Commencement Date, multiplied by the retirement pension
                    payable for a particular month on or after the effective
                    date of this augmentation, plus any other pension increase
                    which may have been granted in previous schedules of

                                       9
<PAGE>   26
                    amendments, cannot exceed the maximum pension augmented with
                    increases of the Consumer Price Index as determined by
                    Revenue Rules.

                                       10
<PAGE>   27

                          ALCAN PENSION PLAN (CANADA)

                          SCHEDULE OF AMENDMENTS 00-3
                          ---------------------------

1.       Subsection 3.07 is amended by replacing the second paragraph with the
         following :

                   "Notwithstanding any other provision of the Plan, there shall
                   be added to the Credited Service of a Member who has taken an
                   authorized maternity leave of absence without pay or an
                   authorized parental leave of absence without pay, a number of
                   months equal to the number of months of such absence
                   provided:

                   a)        he makes an application to that effect to the
                             Administrator within one month from the date of his
                             return to work after the end of his maternity leave
                             or parental leave; and

                   b)        he pays, for each such month, an amount of
                             contribution equal to the contribution that would
                             have been made had he not been so on leave, based
                             on Pensionable Earnings he was receiving at the
                             time he was granted such leave, and

                   c)        he is in a category of employment designated by his
                             Participating Company as being eligible to
                             participate in the Plan from the end of such leave,
                             and

                   d)        the number of months does not exceed 12 for any one
                             leave and, when added to the number of months of
                             authorized maternity leave of absence and
                             authorized parental leave of absence after 1
                             January 1991, does not exceed 96 months."

2.       The following subsection is added after subsection 5.02:

         "5.02.1   TEMPORARY CONTRIBUTION HOLIDAY

                   Notwithstanding paragraphs 3.07(i) and 4.05(b) and
                   subsections 5.01 and 5.02 and with effect from 31 December
                   2000, a Member other than a CAW Member is exempted from
                   contributing to the Plan. The Company reserves the right to
                   periodically review this exemption and undertakes to give the
                   member prior notice of its termination.

                   A Member who would otherwise be required to contribute to the
                   Plan if not for the exemption granted under this subsection
                   shall be deemed to be contributing to the Plan for the
                   purpose only of qualifying under the fifth clause of
                   subsection 1.01, under paragraphs 8.02(c) and 14.01(a) and
                   under Annexes C and D.

                                       1
<PAGE>   28
3.       Paragraph 8.02(a) is amended by adding immediately after the words
         "paragraph (b) hereof" the following:

         "or in accordance with paragraph (b.1) hereof if the Member meets the
         following conditions at Early Retirement date:

         (i)       his Number of Points equals 85 or more, or his Number of
                   Points is 75 and he is age 55 or more; and

         (ii)      he is not a CAW Member".

4.       The following paragraph is added after paragraph 8.02(b):

         "(b.1)    The early  retirement  factor  referred to in paragraph (a)
                   is determined  for a particular  month and is equal to the
                   result of

                   100%      less

                   4%        for each year by which the Member's age precedes
                             age 60,

                             plus

                   4%        if the Number of Points equals 85 or more,

                             plus

                   2%        for each point that the Number of Points exceeds
                             85.

                   The early retirement factor may not exceed 100%."

5.       Subsection 12.02 is amended by replacing the words "has completed two
         or more years of Continuous Service while a Member or two or more years
         of Credited Service" with the words "whose Number of Points is 75 or
         more".

6.       Subsection 12.03 is amended by replacing in the last paragraph the
         number "75" by the number "85".

The above amendments are effective from 31 December 2000.

                                       2