Document:

PROPERTY CO-TENANCY
                       OWNERSHIP AGREEMENT
                  Champps Americana Restaurant
                        Livonia, Michigan

THIS CO-TENANCY AGREEMENT,

Made and entered into as of the 7th day of November, 2001, by and
between   AEI  Income  &  Growth  Fund  XXI  Limited  Partnership
(hereinafter  called  "Co-Tenancy  Manager"),  and  David   Louis
Cruickshank,  trustee under the trust created by the  will  dated
June  5,  1964  of Louis William Achenbach, deceased (hereinafter
called "Cruickshank"). (Cruickshank, Co-Tenancy Manager (and  any
other  Owner  in  Fee  where  the  context  so  indicates)  being
hereinafter   sometimes  collectively  called  "Co-Tenants"   and
referred to in the neuter gender).
WITNESSETH:

WHEREAS,  AEI  Income  &  Growth  Fund  XXI  Limited  Partnership
presently  owns  an undivided 78.5629% interest in  and  to,  and
Cruickshank presently owns an undivided 5.5769% interest  in  and
to,  and Barbara A. Bou-Sliman, Trustee of the First Amended  and
Restated Trust Agreement of Barbara A. Bou-Sliman dated  July  8,
1992 presently owns an undivided 3.4211% interest in and to,  and
Sherrill  L.  Hossom as Trustee of the Sherrill L. Hossom  Family
Trust  dated  May  15, 1992 presently owns an  undivided  4.2226%
interest  in and to, and Linda L. Landes as Trustee of the  Linda
L.  Landes  Family  Trust dated May 15, 1992  presently  owns  an
undivided 4.6600% interest in and to and Elizabeth C. Hsu  Living
Trust dated 11/13/89, Elizabeth C. Hsu, trustee presently owns an
undivided  3.5565% interest in and to the land, situated  in  the
City of Livonia, County of Wayne, and State of Michigan, (legally
described upon Exhibit A attached hereto and hereby made  a  part
hereof)   and   in  and  to  the  improvements  located   thereon
(hereinafter called "Premises");

WHEREAS,  The  parties hereto wish to provide  for:  the  orderly
monitoring  of performance by the present tenant of the  Premises
under  the  triple  net  lease agreement  for  the  Premises;  if
necessary,  upon  a  vacancy in the Premises, the  operation  and
management of the Premises; the continued leasing of space within
the  Premises; and, the distribution of income from and the  pro-
rata sharing in expenses of the Premises by Co-Tenancy Manager in
connection with Cruickshank's interest in the Premises.

NOW THEREFORE, in consideration of the purchase by Cruickshank of
an  undivided interest in and to the Premises, for at  least  One
Dollar  ($1.00) and other good and valuable consideration by  the
parties  hereto  to  one another in hand paid,  the  receipt  and
sufficiency of which are hereby acknowledged, and of  the  mutual
covenants and agreements herein contained, it is hereby agreed by
and between the parties hereto, as follows:

Co-Tenant Initial: /s/ DLC
Co-Tenancy Agreement for Champps, Livonia, MI

1.    Cruickshank,  subject  to  the  limitations  and  power  of
revocation herein expressed, hereby designates Co-Tenancy Manager
as  its  sole  and  exclusive agent and delegates  to  Co-Tenancy
Manager  the  sole  right to monitor and  enforce  on  behalf  of
Cruickshank  the  terms  of the present lease  of  the  Premises,
including  but  not  limited  to  any  amendments,  consents   to
assignment,  sublet, releases or modifications to  the  lease  or
guarantees  of  lease  and to deal with  any  property  agent  or
tenant.  Should  the Premises become vacant,  the  operation  and
management  of  the  Premises, is delegated  by  the  Co-Tenants,
subject to revocation on an individual basis by an individual Co-
Tenant  as otherwise set forth herein, to Co-Tenancy Manager,  or
its  designated agent, successors or assigns. Provided,  however,
if  Co-Tenancy  Manager shall sell all of  its  interest  in  the
Premises,  (or  shall no longer be delegated  the  operation  and
management  of the Premises), the duties and obligations  of  Co-
Tenancy  Manager  respecting management of the  Premises  as  set
forth  herein,  including  but not  limited  to  its  duties  and
obligations  respecting paragraphs 2, 3, and 4 hereof,  shall  be
exercised  by  the holder or holders of a majority undivided  co-
tenancy interests in the Premises. Subject to the approval of all
Co-Tenants evidenced by their written consent, Co-Tenancy Manager
shall  negotiate  and  execute re-leases  of  the  Premises  upon
termination of the present lease of the Premises or negotiate and
execute easements affecting the Premises, may incur ordinary  and
necessary operating expenses in connection with the management of
the  Premises, and propose extraordinary or capital  expenditures
to the Premises. Until Cruickshank shall revoke such authority as
provided  herein,  Co-Tenancy Manager or Cruickshank  itself  may
obligate  Cruickshank with respect to any ordinary and  necessary
operating expense for the Premises.  However, Co-Tenancy  Manager
has no right to obtain a loan for which any other Co-Tenant would
be  liable,  nor may Co-Tenancy Manager finance or refinance  the
Premises  by  secured by any lien or any pledge of the  Premises.
Cruickshank  agrees to execute and deliver to Co-Tenancy  Manager
such  written approval of documents approved by Cruickshank, such
approval to take such form as may be reasonably required  by  Co-
Tenancy  Manager  to  evidence its  authority  to  sign  approved
documents on behalf of Cruickshank.

As  further  set forth in paragraph 2 hereof, Co-Tenancy  Manager
agrees  to require any lessee of the Premises to name Cruickshank
as  an  insured  or additional insured in all insurance  policies
provided for, or contemplated by, any lease on the Premises.  Co-
Tenancy Manager shall use its best efforts to obtain endorsements
adding Co-Tenants to said policies from lessee within 30 days  of
commencement of this agreement. In any event, Co-Tenancy  Manager
shall  distribute any insurance proceeds it may receive,  to  the
extent  consistent  with any lease on the Premises,  to  the  Co-
Tenants  in  proportion  to  their respective  ownership  of  the
Premises.

2.    Income and expenses shall be allocated among the Co-Tenants
in  proportion to their respective share(s) of ownership.  Shares
of  net income shall be pro-rated for any partial calendar  years
included  within the term of this Agreement.  Co-Tenancy  Manager
may offset against, pay to itself and deduct from any payment due
to  Cruickshank under this Agreement, and may pay to  itself  the
amount  of Cruickshank's share of any reasonable expenses of  the
Premises which are not paid by Cruickshank to Co-Tenancy  Manager
or  its  assigns, within ten (10) days after demand by Co-Tenancy
Manager.   In  the  event there is insufficient operating  income

Co-Tenant Initial: /s/ DLC
Co-Tenancy Agreement for Champps, Livonia, MI

from  which  to  deduct Cruickshank's unpaid share  of  operating
expenses,  Co-Tenancy  Manager  may  pursue  any  and  all  legal
remedies for collection.

Operating  Expenses  shall include all normal operating  expense,
including  but not limited to: maintenance, utilities,  supplies,
labor, management, advertising and promotional expenses, salaries
and wages of rental and management personnel, leasing commissions
to  third  parties, a monthly accrual to pay insurance  premiums,
real  estate taxes, installments of special assessments  and  for
structural repairs and replacements, management fees, legal  fees
and accounting fees, but excluding all operating expenses paid by
tenant under terms of any lease agreement of the Premises.

Cruickshank  has no requirement to, but has, nonetheless  elected
to  retain, and agrees to annually compensate, Co-Tenancy Manager
in  the  amount  of $899 for the expenses, direct  and  indirect,
incurred  by  Co-Tenancy  Manager in providing  Cruickshank  with
quarterly accounting and distributions of Cruickshank's share  of
net   income  and  for  tracking,  reporting  and  assessing  the
calculation of Cruickshank's share of operating expenses incurred
from  the  Premises. This invoice amount shall be  pro-rated  for
partial  years and Cruickshank authorizes Co-Tenancy  Manager  to
deduct  such amount from Cruickshank's share of revenue from  the
Premises.  Cruickshank  may  terminate  this  agreement  in  this
paragraph respecting accounting and distributions at any time and
attempt  to collect its share of rental income directly from  the
tenant;  Co-Tenancy  Manager may terminate its  obligation  under
this  paragraph upon 30 days written notice to Cruickshank  prior
to  the  end of each anniversary hereof, unless agreed in writing
to the contrary.

3.    Full, accurate and complete books of account shall be  kept
in accordance with generally accepted accounting principles at Co-
Tenancy  Manager  's principal office, and each  Co-Tenant  shall
have  access  to  such books and may inspect and  copy  any  part
thereof  during  normal business hours. Within ninety  (90)  days
after  the end of each calendar year during the term hereof,  Co-
Tenancy  Manager shall prepare an accurate income  statement  for
the  ownership of the Premises for said calendar year  and  shall
furnish copies of the same to all Co-Tenants. Quarterly,  as  its
share,  Cruickshank shall be entitled to receive 5.5769%  of  all
items  of  income  and expense generated by the  Premises.   Upon
receipt of said accounting, if the payments received by each  Co-
Tenant  pursuant  to  this Paragraph  3  do  not  equal,  in  the
aggregate,  the  amounts  which  each  are  entitled  to  receive
proportional  to  its  share of ownership with  respect  to  said
calendar  year  pursuant  to Paragraph 2 hereof,  an  appropriate
adjustment  shall  be  made so that each Co-Tenant  receives  the
amount to which it is entitled.

4.    If  Net Income from the Premises is less than $0.00  (i.e.,
the  Premises  operates  at a loss), or if capital  improvements,
repairs, and/or replacements, for which adequate reserves do  not
exist,  need  to  be made to the Premises, the  Co-Tenants,  upon
receipt  of  a written request therefore from Co-Tenancy  Manager
shall, within fifteen (15) business days after receipt of notice,
make  payment  to Co-Tenancy Manager sufficient to pay  said  net
operating  losses and to provide necessary operating capital  for
the  premises  and to pay for said capital improvements,  repairs
and/or   replacements,  all  in  proportion  to  their  undivided
interests in and to the Premises. All Co-Tenants shall  have  the
right to review all contracts that will have a material effect on
the  Premises.   All Co-Tenants shall have the right  to  approve
budgets  and  major capital expenditures affecting the  Premises.

Co-Tenant Initial: /s/ DLC
Co-Tenancy Agreement for Champps, Livonia, MI

While  Co-Tenancy Manager shall own an interest in the  Premises,
Co-Tenants  agree to delegate the determination of  such  budgets
and  need for capital expenditures to Co-Tenancy Manager  subject
to  the  power  of  any Co-Tenant to revoke  such  delegation  in
accordance with the provisions hereof.

5.    Co-Tenants  may, at any time, sell, finance,  or  otherwise
create  a lien upon their interest in the Premises but only  upon
their  interest  and not upon any part of the interest  held,  or
owned, by any other Co-Tenant, and shall not create any lien upon
their  individual interest if by operation of law such lien shall
by  law  extend to the interest of any other Co-Tenant.  All  Co-
Tenants reserve the right to escrow proceeds from a sale of their
interests in the Premises to obtain tax deferral by the  purchase
of replacement property.

6.    If any Co-Tenant shall be in default with respect to any of
its  obligations hereunder, and if said default is not  corrected
within  thirty  (30)  days after receipt by said  defaulting  Co-
Tenant  of written notice of said default, or within a reasonable
period  if  said default does not consist solely of a failure  to
pay money, the remaining Co-Tenant(s) may resort to any available
remedy to cure said default at law, in equity, or by statute.

7.    This Co-Tenancy agreement shall continue in full force  and
effect  and shall bind and inure to the benefit of the  Co-Tenant
and  their respective heirs, executors, administrators,  personal
representatives, successors and permitted assigns until  May  31,
2018  or upon the sale of the entire Premises in accordance  with
the terms hereof and proper disbursement of the proceeds thereof,
whichever shall first occur.  Unless specifically identified as a
personal  contract  right or obligation  herein,  this  agreement
shall  run  with any interest in the Property and with the  title
thereto. Once any person, party or entity has ceased to  have  an
interest  in fee in any portion of the Entire Property, it  shall
not be bound by, subject to or benefit from the terms hereof; but
its  heirs,  executors, administrators, personal representatives,
successors  or assigns, as the case may be, shall be  substituted
for it hereunder.   Any Co-Tenant may, at any time effective upon
written notice to Co-Tenancy Manager revoke the designation of Co-
Tenancy Manager as such Co-Tenant's agent for the purposes as set
forth  herein.   Any Co-Tenant revoking such designation  of  Co-
Tenancy  Manager's  agency  shall notify  Co-Tenancy  Manager  in
writing  in  accordance with the terms hereof and such revocation
shall  be  effective upon Co-Tenancy Manager's  receipt  of  such
written revocation.

8.    Any notice or election required or permitted to be given or
served by any party hereto to, or upon any other, shall be  given
to  all known Co-Tenants and deemed given or served in accordance
with  the  provisions  of  this  Agreement,  if  said  notice  or
elections addressed as follows;

If to AEI Income & Growth Fund XXI Limited Partnership:

     1300 Minnesota World Trade Center
     30 East Seventh Street
     St. Paul, MN 55101

Co-Tenant Initial: /s/ DLC
Co-Tenancy Agreement for Champps, Livonia, MI

If to Cruickshank:

     David Louis Cruickshank, trustee under the trust created by
     the  will  dated  June 5, 1964 of Louis William  Achenbach,
     deceased
     8050 Poplar Lane
     Carmel, CA 93923

If to Bou-Sliman:

     Barbara A. Bou-Sliman, Trustee of the
     First Amended and Restated Trust Agreement of
     Barbara A. Bou-Sliman, dated July 8, 1992
     267 Colonade Circle
     Naples, FL 34103

If to Hossom:

     Sherrill L. Hossom as trustee of the
     Sherrill L. Hossom Family Trust,
     dated May 15, 1992
     16428 Lookout Lane
     Bow, WA 98232

If to Landes:

     Linda L. Landes as trustee of the
     Linda L. Landes Family Trust,
     dated May 15, 1992
     5621 Corso Di Napoli
     Long Beach, CA 90802

If to Hsu:

     Elizabeth C. Hsu Living Trust,
     dated 11/13/89
     7224 Old Mill Road
     Bloomfield Township, MI 48301

Each mailed notice or election shall be deemed to have been given
to,  or served upon, the party to which addressed on the date the
same  is  deposited in the United States certified  mail,  return
receipt  requested,  postage prepaid, or given  to  a  nationally
recognized  courier  service guaranteeing overnight  delivery  as
properly addressed in the manner above provided. Any party hereto
may  change  its address for the service of notice  hereunder  by

Co-Tenant Initial: /s/ DLC
Co-Tenancy Agreement for Champps, Livonia, MI

delivering  written notice of said change to  the  other  parties
hereunder, in the manner above specified, at least ten (10)  days
prior  to  the  effective  date of said  change.   Any  Co-Tenant
selling or transferring all or a portion of its interest  in  the
Premises  shall  provide,  within a  reasonable  time  after  the
completion of such sale or transfer, written notice to all  other
Co-Tenants of the name and address of such new Co-Tenant and  the
interest  held by such new Co-Tenant.  Upon written request  from
Co-Tenancy Manager from time to time at reasonable intervals, Co-
Tenant   shall  provide  a  current  Affidavit  of   Trustee   or
Certificate  of  Trustee verifying the name and  address  of  the
current  trustee(s)  empowered  to  transfer  interests  in   the
Premises owned by Co-Tenant.

9.    This  Agreement shall not create any partnership  or  joint
venture  among or between the Co-Tenants or any of them;  no  Co-
Tenant shall file any partnership tax returns nor otherwise  take
any action respecting nor represent the relationship among the Co-
Tenants  as other than co-tenants of undivided interests in  real
property.  The only relationship among and between the Co-Tenants
hereunder  shall be that of owners of the Premises as tenants  in
common subject to the terms hereof.

10.    The  unenforceability or invalidity of  any  provision  or
provisions  of  this Agreement as to any person or  circumstances
shall  not render that provision, nor any other provision hereof,
unenforceable or invalid as to any other person or circumstances,
and  all  provisions hereof, in all other respects, shall  remain
valid and enforceable.

11.   In  the  event  any litigation arises between  the  parties
hereto  relating  to  this Agreement, or any  of  the  provisions
hereof, the party prevailing in such action shall be entitled  to
receive  from the losing party, in addition to all other  relief,
remedies  and  damages  to  which it is otherwise  entitled,  all
reasonable  costs  and expenses, including reasonable  attorneys'
fees,  incurred by the prevailing party in connection  with  said
litigation.

12.   To  the extent that this agreement binds all Co-Tenants  of
the  Premises, such covenants are deemed to run with the land and
shall be evidenced in a Co-Tenancy Agreement entered into by  any
Co-Tenant  with  any  purchaser of all  or  any  portion  of  its
interest  in  the  Premises.  Except  as  otherwise  provided  or
modified herein, Co-Tenants retain all rights otherwise available
under law to any Co-Tenant of an interest in Real Property.

13.   Every  Co-Tenant, shall have a right of  first  refusal  to
purchase  the  interest of any other Co-Tenant in  the  Premises,
upon  the  following limited terms and conditions.  If  and  only
when  a  Co-Tenant shall give written notice to another Co-Tenant
(and only as to such Co-Tenant receiving such notice) of a desire
to  be  notified  of  any  proposed sale  "Notice  of  Desire  to
Purchase"), Co-Tenants desiring notice of proposed sales  of  Co-
Tenancy interests shall receive notice of proposed sales  of  the
interest of the Co-Tenant who has received a Notice of Desire  to
Purchase.  Any  Co-Tenant offering its interest  or  any  portion
thereof for sale ("Selling Co-Tenant") shall first notify all Co-
Tenants  who  have provided a Notice of Desire to Purchase.  Such
notice  ("Selling  Co-Tenant's Notice") shall  give  Selling  Co-
Tenant's name and address and state a price at which Selling  Co-
Tenant  intends to sell and will sell a specified portion or  all
of its interest in the fee simple to the Leased Premises.

Co-Tenant Initial: /s/ DLC
Co-Tenancy Agreement for Champps, Livonia, MI

If  a Co-Tenant shall fail to exercise its Right of First Refusal
as  set forth herein, those Co-Tenant's exercising their Right of
First  Refusal  shall  buy all, but not less  than  all,  of  the
interest  in  the  Premises offered for sale by the  Selling  Co-
Tenant, purchasing prorata in proportion that the purchasing  Co-
Tenant's  interests in the Premises shall bear  to  one  another.
For  ten (10) business days (the "Right of First Refusal Period")
following the giving of such notice, a Co-Tenant shall  have  the
option  to  purchase  such portion of the  fee  interest  of  the
Selling  Co-Tenant as set forth in Selling Co-Tenant's Notice  at
the  price  in cash stated in the Selling Co-Tenant's Notice.   A
written notice addressed to Selling Co-Tenant and signed  by  the
purchasing  Co-Tenant  shall be given,  in  accordance  with  the
provisions  hereof  respecting the giving of notice,  within  the
period set forth above for exercising the Right of First Refusal.
If  no  Co-Tenant  shall  exercise its Right  of  First  Refusal,
Selling  Co-Tenant shall be free to market its  interest  in  the
Premises  after  expiration of the Right of First Refusal  Period
and  shall be free to sell all or any portion of its interest  in
the  Premises at a price prorata greater than, or equal to,  that
which is set forth in the Selling Co-Tenant's Notice.

The above provisions shall not apply to the sale or transfer of a
Co-Tenant's  interest in the Premises if such  sale  or  transfer
shall be to an affiliate of the selling or transferring Co-Tenant
or  to  a trust established by such Co-Tenant for estate planning
purposes.

       THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK

Co-Tenant Initial: /s/ DLC
Co-Tenancy Agreement for Champps, Livonia, MI

IN WITNESS WHEREOF, The parties hereto have caused this Agreement
to be executed and delivered, as of the day and year first above
written.

          The trust created by the will dated June 5, 1964 of
          Louis William Achenbach, deceased

          By: /s/   David Louis Cruickshank
                    David Louis Cruickshank, trustee
          Address:  8050 Poplar Lane
                    Carmel, CA 93923

STATE OF CALIFORNIA)
                        ) ss
COUNTY OF TULARE)

I,  a Notary Public in and for the state and county of aforesaid,
hereby certify there appeared before me this 16th day of October,
2001, David Louis Cruickshank, trustee under the trust created by
the will dated June 5, 1964 of Louis William Achenbach, deceased,
who executed the foregoing instrument in said capacity.

                              /s/ Patricia A. Worden
                                   Notary Public
[notary seal]

WITNESS 1:                       WITNESS 2:

By: /s/ Patricia A Worden        By: /s/ Kara Wiley

(Print Name & Address below)     (Print Name & Address below)

     Patricia A Worden                Kara Wiley

     1750 W Walnut Visalia, CA        1750  W Walnut Visalia,  CA
                                      93277

Co-Tenant Initial: /s/ DLC
Co-Tenancy Agreement for Champps, Livonia, MI

           AEI Income & Growth Fund XXI Limited Partnership by
           AEI Fund Management  XXI, Inc., its  corporate  general
           partner

           By:/s/ Robert P Johnson
                  Robert P. Johnson, its President

State of Minnesota )
                                    ) ss.
County of Ramsey )

I,  a Notary Public in and for the state and county of aforesaid,
hereby certify there appeared before me this 7th day of November,
2001,  Robert  P. Johnson, President of AEI Fund Management  XXI,
Inc.,  the corporate general partner of AEI Income & Growth  Fund
XXI Limited Partnership, who executed the foregoing instrument in
said capacity and on behalf of the corporation.

                                   /s/ Debra A Jochum

                                        Notary Public

[notary seal]

WITNESS 1:                       WITNESS 2:

By: /s/ Debra L Achman           By: /s/ Jeanne C Herda

(Print Name & Address below)     (Print Name & Address below)

     Debra L Achman                   1300 WTC
     1300  World Trade Center         St. Paul MN  55105
     30 E 7th St                      Jeanne C Herda
     St. Paul, MN  55101

       The name of the party who drafted this document is:
   AEI Fund Management, Inc., 1300 World Trade Center, 30 East
               Seventh Street, St. Paul, MN 55101
                          651-227-7333

Co-Tenant Initial: /s/ DLC
Co-Tenancy Agreement for Champps, Livonia, MI

                           EXHIBIT "A"

     Unit 3, Pentagon Centre Condominium, according to the Master
     Deed  recorded  in Liber 29370, Pages 706 through  766  1/2,
     both  inclusive, as amended by First Amendment to the Master
     Deed  recorded in Liber 29631, Pages 1995 through 2003, both
     inclusive, as amended by Second Amendment to the Master Deed
     recorded  in  Liber  29696,  Pages  571  through  577,  both
     inclusive, as amended by Third Amendment to the Master  Deed
     recorded  in  Liber  29805,  Pages  766  through  767,  both
     inclusive, and as amended by Fourth Amendment to the  Master
     Deed  recorded  in  Liber 31338, Pages  1  through  4,  both
     inclusive,  Wayne  County Records, and designated  as  Wayne
     County  Condominium Subdivision Plan No. 437, together  with
     rights   in  general  common  elements  and  limited  common
     elements,  as  set  forth in the above Master  Deed  and  as
     described in Act 229 of the Public Acts of 1963, and Act  59
     of the Public Acts of 1978, as amended.

     19470 Haggerty

     Tax I.D. No. 46-023-01-0003-000PROPERTY CO-TENANCY
                       OWNERSHIP AGREEMENT
                  Champps Americana Restaurant
                        Livonia, Michigan

THIS CO-TENANCY AGREEMENT,

Made  and  entered into as of the 16th day of November, 2001,  by
and  between  AEI  Income & Growth Fund XXI  Limited  Partnership
(hereinafter  called  "Co-Tenancy  Manager"),  and   Gregory   A.
Roemhild  (hereinafter called "Roemhild"). (Roemhild,  Co-Tenancy
Manager  (and  any  other  Owner in  Fee  where  the  context  so
indicates)  being hereinafter sometimes collectively called  "Co-
Tenants" and referred to in the neuter gender).
WITNESSETH:

WHEREAS,  AEI  Income  &  Growth  Fund  XXI  Limited  Partnership
presently  owns  an undivided 74.6801% interest in  and  to,  and
Roemhild presently owns an undivided 3.8828% interest in and  to,
and  David Louis Cruickshank, trustee under the trust created  by
the  will dated June 5, 1964 of Louis William Achenbach, deceased
presently  owns  an undivided 5.5769% interest  in  and  to,  and
Barbara  A. Bou-Sliman, Trustee of the First Amended and Restated
Trust  Agreement  of  Barbara A. Bou-Sliman dated  July  8,  1992
presently  owns  an undivided 3.4211% interest  in  and  to,  and
Sherrill  L.  Hossom as Trustee of the Sherrill L. Hossom  Family
Trust  dated  May  15, 1992 presently owns an  undivided  4.2226%
interest  in and to, and Linda L. Landes as Trustee of the  Linda
L.  Landes  Family  Trust dated May 15, 1992  presently  owns  an
undivided 4.6600% interest in and to and Elizabeth C. Hsu  Living
Trust dated 11/13/89, Elizabeth C. Hsu, trustee presently owns an
undivided  3.5565% interest in and to the land, situated  in  the
City of Livonia, County of Wayne, and State of Michigan, (legally
described upon Exhibit A attached hereto and hereby made  a  part
hereof)   and   in  and  to  the  improvements  located   thereon
(hereinafter called "Premises");

WHEREAS,  The  parties hereto wish to provide  for:  the  orderly
monitoring  of performance by the present tenant of the  Premises
under  the  triple  net  lease agreement  for  the  Premises;  if
necessary,  upon  a  vacancy in the Premises, the  operation  and
management of the Premises; the continued leasing of space within
the  Premises; and, the distribution of income from and the  pro-
rata sharing in expenses of the Premises by Co-Tenancy Manager in
connection with Roemhild's interest in the Premises.

NOW THEREFORE, in consideration of the purchase by Roemhild of an
undivided  interest  in and to the Premises,  for  at  least  One
Dollar  ($1.00) and other good and valuable consideration by  the
parties  hereto  to  one another in hand paid,  the  receipt  and
sufficiency of which are hereby acknowledged, and of  the  mutual
covenants and agreements herein contained, it is hereby agreed by
and between the parties hereto, as follows:

Co-Tenant Initial:/s/ GAR
Co-Tenancy Agreement for Champp's Americana Restaurant, Livonia, MI

1.   Roemhild, subject to the limitations and power of revocation
herein  expressed, hereby designates Co-Tenancy  Manager  as  its
sole and exclusive agent and delegates to Co-Tenancy Manager  the
sole right to monitor and enforce on behalf of Roemhild the terms
of  the  present lease of the Premises, including but not limited
to  any  amendments, consents to assignment, sublet, releases  or
modifications  to the lease or guarantees of lease  and  to  deal
with  any  property agent or tenant. Should the  Premises  become
vacant,  the  operation  and  management  of  the  Premises,   is
delegated  by  the  Co-Tenants,  subject  to  revocation  on   an
individual  basis  by an individual Co-Tenant  as  otherwise  set
forth  herein,  to  Co-Tenancy Manager, or its designated  agent,
successors  or assigns. Provided, however, if Co-Tenancy  Manager
shall  sell  all of its interest in the Premises,  (or  shall  no
longer   be  delegated  the  operation  and  management  of   the
Premises),  the  duties  and obligations  of  Co-Tenancy  Manager
respecting  management  of  the Premises  as  set  forth  herein,
including   but  not  limited  to  its  duties  and   obligations
respecting  paragraphs 2, 3, and 4 hereof, shall be exercised  by
the   holder  or  holders  of  a  majority  undivided  co-tenancy
interests  in the Premises. Subject to the approval  of  all  Co-
Tenants  evidenced  by their written consent, Co-Tenancy  Manager
shall  negotiate  and  execute re-leases  of  the  Premises  upon
termination of the present lease of the Premises or negotiate and
execute easements affecting the Premises, may incur ordinary  and
necessary operating expenses in connection with the management of
the  Premises, and propose extraordinary or capital  expenditures
to  the  Premises. Until Roemhild shall revoke such authority  as
provided  herein,  Co-Tenancy  Manager  or  Roemhild  itself  may
obligate  Roemhild  with  respect to any ordinary  and  necessary
operating expense for the Premises.  However, Co-Tenancy  Manager
has no right to obtain a loan for which any other Co-Tenant would
be  liable,  nor may Co-Tenancy Manager finance or refinance  the
Premises  by  secured by any lien or any pledge of the  Premises.
Roemhild agrees to execute and deliver to Co-Tenancy Manager such
written approval of documents approved by Roemhild, such approval
to  take  such  form as may be reasonably required by  Co-Tenancy
Manager  to evidence its authority to sign approved documents  on
behalf of Roemhild.

As  further  set forth in paragraph 2 hereof, Co-Tenancy  Manager
agrees to require any lessee of the Premises to name Roemhild  as
an  insured  or  additional  insured in  all  insurance  policies
provided for, or contemplated by, any lease on the Premises.  Co-
Tenancy Manager shall use its best efforts to obtain endorsements
adding Co-Tenants to said policies from lessee within 30 days  of
commencement of this agreement. In any event, Co-Tenancy  Manager
shall  distribute any insurance proceeds it may receive,  to  the
extent  consistent  with any lease on the Premises,  to  the  Co-
Tenants  in  proportion  to  their respective  ownership  of  the
Premises.

2.    Income and expenses shall be allocated among the Co-Tenants
in  proportion to their respective share(s) of ownership.  Shares
of  net income shall be pro-rated for any partial calendar  years
included  within the term of this Agreement.  Co-Tenancy  Manager
may offset against, pay to itself and deduct from any payment due
to  Roemhild  under  this Agreement, and may pay  to  itself  the
amount  of  Roemhild's share of any reasonable  expenses  of  the
Premises which are not paid by Roemhild to Co-Tenancy Manager  or
its  assigns,  within  ten (10) days after demand  by  Co-Tenancy

Co-Tenant Initial:/s/ GAR
Co-Tenancy Agreement for Champp's Americana Restaurant, Livonia, MI

Manager.   In  the  event there is insufficient operating  income
from  which  to  deduct  Roemhild's  unpaid  share  of  operating
expenses,  Co-Tenancy  Manager  may  pursue  any  and  all  legal
remedies for collection.

Operating  Expenses  shall include all normal operating  expense,
including  but not limited to: maintenance, utilities,  supplies,
labor, management, advertising and promotional expenses, salaries
and wages of rental and management personnel, leasing commissions
to  third  parties, a monthly accrual to pay insurance  premiums,
real  estate taxes, installments of special assessments  and  for
structural repairs and replacements, management fees, legal  fees
and accounting fees, but excluding all operating expenses paid by
tenant under terms of any lease agreement of the Premises.

Roemhild  has no requirement to, but has, nonetheless elected  to
retain, and agrees to annually compensate, Co-Tenancy Manager  in
the  amount  of  $626  for  the expenses,  direct  and  indirect,
incurred  by  Co-Tenancy  Manager  in  providing  Roemhild   with
quarterly accounting and distributions of Roemhild's share of net
income  and for tracking, reporting and assessing the calculation
of  Roemhild's  share  of operating expenses  incurred  from  the
Premises.  This  invoice amount shall be  pro-rated  for  partial
years  and Roemhild authorizes Co-Tenancy Manager to deduct  such
amount  from  Roemhild's  share of  revenue  from  the  Premises.
Roemhild   may   terminate  this  agreement  in  this   paragraph
respecting  accounting and distributions at any time and  attempt
to  collect its share of rental income directly from the  tenant;
Co-Tenancy  Manager  may  terminate  its  obligation  under  this
paragraph  upon 30 days written notice to Roemhild prior  to  the
end  of each anniversary hereof, unless agreed in writing to  the
contrary.

3.    Full, accurate and complete books of account shall be  kept
in accordance with generally accepted accounting principles at Co-
Tenancy  Manager  's principal office, and each  Co-Tenant  shall
have  access  to  such books and may inspect and  copy  any  part
thereof  during  normal business hours. Within ninety  (90)  days
after  the end of each calendar year during the term hereof,  Co-
Tenancy  Manager shall prepare an accurate income  statement  for
the  ownership of the Premises for said calendar year  and  shall
furnish copies of the same to all Co-Tenants. Quarterly,  as  its
share, Roemhild shall be entitled to receive 3.8828% of all items
of income and expense generated by the Premises.  Upon receipt of
said  accounting,  if  the payments received  by  each  Co-Tenant
pursuant to this Paragraph 3 do not equal, in the aggregate,  the
amounts  which each are entitled to receive proportional  to  its
share of ownership with respect to said calendar year pursuant to
Paragraph  2 hereof, an appropriate adjustment shall be  made  so
that each Co-Tenant receives the amount to which it is entitled.

4.    If  Net Income from the Premises is less than $0.00  (i.e.,
the  Premises  operates  at a loss), or if capital  improvements,
repairs, and/or replacements, for which adequate reserves do  not
exist,  need  to  be made to the Premises, the  Co-Tenants,  upon
receipt  of  a written request therefore from Co-Tenancy  Manager
shall, within fifteen (15) business days after receipt of notice,
make  payment  to Co-Tenancy Manager sufficient to pay  said  net
operating  losses and to provide necessary operating capital  for
the  premises  and to pay for said capital improvements,  repairs
and/or   replacements,  all  in  proportion  to  their  undivided
interests in and to the Premises. All Co-Tenants shall  have  the
right to review all contracts that will have a material effect on

Co-Tenant Initial:/s/ GAR
Co-Tenancy Agreement for Champp's Americana Restaurant, Livonia, MI

the  Premises.   All Co-Tenants shall have the right  to  approve
budgets  and  major capital expenditures affecting the  Premises.
While  Co-Tenancy Manager shall own an interest in the  Premises,
Co-Tenants  agree to delegate the determination of  such  budgets
and  need for capital expenditures to Co-Tenancy Manager  subject
to  the  power  of  any Co-Tenant to revoke  such  delegation  in
accordance with the provisions hereof.

5.    Co-Tenants  may, at any time, sell, finance,  or  otherwise
create  a lien upon their interest in the Premises but only  upon
their  interest  and not upon any part of the interest  held,  or
owned, by any other Co-Tenant, and shall not create any lien upon
their  individual interest if by operation of law such lien shall
by  law  extend to the interest of any other Co-Tenant.  All  Co-
Tenants reserve the right to escrow proceeds from a sale of their
interests in the Premises to obtain tax deferral by the  purchase
of replacement property.

6.    If any Co-Tenant shall be in default with respect to any of
its  obligations hereunder, and if said default is not  corrected
within  thirty  (30)  days after receipt by said  defaulting  Co-
Tenant  of written notice of said default, or within a reasonable
period  if  said default does not consist solely of a failure  to
pay money, the remaining Co-Tenant(s) may resort to any available
remedy to cure said default at law, in equity, or by statute.

7.    This Co-Tenancy agreement shall continue in full force  and
effect  and shall bind and inure to the benefit of the  Co-Tenant
and  their respective heirs, executors, administrators,  personal
representatives, successors and permitted assigns until  May  31,
2018  or upon the sale of the entire Premises in accordance  with
the terms hereof and proper disbursement of the proceeds thereof,
whichever shall first occur.  Unless specifically identified as a
personal  contract  right or obligation  herein,  this  agreement
shall  run  with any interest in the Property and with the  title
thereto. Once any person, party or entity has ceased to  have  an
interest  in fee in any portion of the Entire Property, it  shall
not be bound by, subject to or benefit from the terms hereof; but
its  heirs,  executors, administrators, personal representatives,
successors  or assigns, as the case may be, shall be  substituted
for it hereunder.   Any Co-Tenant may, at any time effective upon
written notice to Co-Tenancy Manager revoke the designation of Co-
Tenancy Manager as such Co-Tenant's agent for the purposes as set
forth  herein.   Any Co-Tenant revoking such designation  of  Co-
Tenancy  Manager's  agency  shall notify  Co-Tenancy  Manager  in
writing  in  accordance with the terms hereof and such revocation
shall  be  effective upon Co-Tenancy Manager's  receipt  of  such
written revocation.

8.    Any notice or election required or permitted to be given or
served by any party hereto to, or upon any other, shall be  given
to  all known Co-Tenants and deemed given or served in accordance
with  the  provisions  of  this  Agreement,  if  said  notice  or
elections addressed as follows;

If to AEI Income & Growth Fund XXI Limited Partnership:

     1300 Minnesota World Trade Center
     30 East Seventh Street
     St. Paul, MN 55101

Co-Tenant Initial:/s/ GAR
Co-Tenancy Agreement for Champp's Americana Restaurant, Livonia, MI

If to Roemhild:

     Gregory A. Roemhild
     814 - 10 1/2 Avenue
     Box 103
     Almena, WI 54805

If to Cruickshank:

     David Louis Cruickshank, trustee under the trust
     created by the will dated June 5, 1964 of
     Louis William Achenbach, deceased
     8050 Poplar Lane
     Carmel, CA 93923

If to Bou-Sliman:

     Barbara A. Bou-Sliman, Trustee of the
     First Amended and Restated Trust Agreement of
     Barbara A. Bou-Sliman, dated July 8, 1992
     267 Colonade Circle
     Naples, FL 34103

If to Hossom:

     Sherrill L. Hossom as trustee of the
     Sherrill L. Hossom Family Trust,
     dated May 15, 1992
     16428 Lookout Lane
     Bow, WA 98232

If to Landes:

     Linda L. Landes as trustee of the
     Linda L. Landes Family Trust,
     dated May 15, 1992
     5621 Corso Di Napoli
     Long Beach, CA 90802

Co-Tenant Initial:/s/ GAR
Co-Tenancy Agreement for Champp's Americana Restaurant, Livonia, MI

If to Hsu:

     Elizabeth C. Hsu Living Trust,
     dated 11/13/89
     7224 Old Mill Road
     Bloomfield Township, MI 48301

Each mailed notice or election shall be deemed to have been given
to,  or served upon, the party to which addressed on the date the
same  is  deposited in the United States certified  mail,  return
receipt  requested,  postage prepaid, or given  to  a  nationally
recognized  courier  service guaranteeing overnight  delivery  as
properly addressed in the manner above provided. Any party hereto
may  change  its address for the service of notice  hereunder  by
delivering  written notice of said change to  the  other  parties
hereunder, in the manner above specified, at least ten (10)  days
prior  to  the  effective  date of said  change.   Any  Co-Tenant
selling or transferring all or a portion of its interest  in  the
Premises  shall  provide,  within a  reasonable  time  after  the
completion of such sale or transfer, written notice to all  other
Co-Tenants of the name and address of such new Co-Tenant and  the
interest held by such new Co-Tenant.

9.    This  Agreement shall not create any partnership  or  joint
venture  among or between the Co-Tenants or any of them;  no  Co-
Tenant shall file any partnership tax returns nor otherwise  take
any action respecting nor represent the relationship among the Co-
Tenants  as other than co-tenants of undivided interests in  real
property.  The only relationship among and between the Co-Tenants
hereunder  shall be that of owners of the Premises as tenants  in
common subject to the terms hereof.

10.    The  unenforceability or invalidity of  any  provision  or
provisions  of  this Agreement as to any person or  circumstances
shall  not render that provision, nor any other provision hereof,
unenforceable or invalid as to any other person or circumstances,
and  all  provisions hereof, in all other respects, shall  remain
valid and enforceable.

11.   In  the  event  any litigation arises between  the  parties
hereto  relating  to  this Agreement, or any  of  the  provisions
hereof, the party prevailing in such action shall be entitled  to
receive  from the losing party, in addition to all other  relief,
remedies  and  damages  to  which it is otherwise  entitled,  all
reasonable  costs  and expenses, including reasonable  attorneys'
fees,  incurred by the prevailing party in connection  with  said
litigation.

12.   To  the extent that this agreement binds all Co-Tenants  of
the  Premises, such covenants are deemed to run with the land and
shall be evidenced in a Co-Tenancy Agreement entered into by  any
Co-Tenant  with  any  purchaser of all  or  any  portion  of  its
interest  in  the  Premises.  Except  as  otherwise  provided  or
modified herein, Co-Tenants retain all rights otherwise available
under law to any Co-Tenant of an interest in Real Property.

13.   Every  Co-Tenant, shall have a right of  first  refusal  to
purchase  the  interest of any other Co-Tenant in  the  Premises,
upon  the  following limited terms and conditions.  If  and  only
when  a  Co-Tenant shall give written notice to another Co-Tenant
(and only as to such Co-Tenant receiving such notice) of a desire

Co-Tenant Initial:/s/ GAR
Co-Tenancy Agreement for Champp's Americana Restaurant, Livonia, MI

to  be  notified  of  any  proposed sale  "Notice  of  Desire  to
Purchase"), Co-Tenants desiring notice of proposed sales  of  Co-
Tenancy interests shall receive notice of proposed sales  of  the
interest of the Co-Tenant who has received a Notice of Desire  to
Purchase.  Any  Co-Tenant offering its interest  or  any  portion
thereof for sale ("Selling Co-Tenant") shall first notify all Co-
Tenants  who  have provided a Notice of Desire to Purchase.  Such
notice  ("Selling  Co-Tenant's Notice") shall  give  Selling  Co-
Tenant's name and address and state a price at which Selling  Co-
Tenant  intends to sell and will sell a specified portion or  all
of its interest in the fee simple to the Leased Premises.

If  a Co-Tenant shall fail to exercise its Right of First Refusal
as  set forth herein, those Co-Tenant's exercising their Right of
First  Refusal  shall  buy all, but not less  than  all,  of  the
interest  in  the  Premises offered for sale by the  Selling  Co-
Tenant, purchasing prorata in proportion that the purchasing  Co-
Tenant's  interests in the Premises shall bear  to  one  another.
For  ten (10) business days (the "Right of First Refusal Period")
following the giving of such notice, a Co-Tenant shall  have  the
option  to  purchase  such portion of the  fee  interest  of  the
Selling  Co-Tenant as set forth in Selling Co-Tenant's Notice  at
the  price  in cash stated in the Selling Co-Tenant's Notice.   A
written notice addressed to Selling Co-Tenant and signed  by  the
purchasing  Co-Tenant  shall be given,  in  accordance  with  the
provisions  hereof  respecting the giving of notice,  within  the
period set forth above for exercising the Right of First Refusal.
If  no  Co-Tenant  shall  exercise its Right  of  First  Refusal,
Selling  Co-Tenant shall be free to market its  interest  in  the
Premises  after  expiration of the Right of First Refusal  Period
and  shall be free to sell all or any portion of its interest  in
the  Premises at a price prorata greater than, or equal to,  that
which is set forth in the Selling Co-Tenant's Notice.

The above provisions shall not apply to the sale or transfer of a
Co-Tenant's  interest in the Premises if such  sale  or  transfer
shall be to an affiliate of the selling or transferring Co-Tenant
or  to  a trust established by such Co-Tenant for estate planning
purposes.

       THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK

Co-Tenant Initial:/s/ GAR
Co-Tenancy Agreement for Champp's Americana Restaurant, Livonia, MI

IN WITNESS WHEREOF, The parties hereto have caused this Agreement
to be executed and delivered, as of the day and year first above
written.

          Gregory A. Roemhild

          By: /s/ Gregory A Roemhild
                  Gregory A. Roemhild
          Address:  814 - 10 1/2 Avenue
                    Box 103
                    Almena, WI 54805

STATE OF WISCONSIN)
                        ) ss
COUNTY OF BARRON)

I,  a Notary Public in and for the state and county of aforesaid,
hereby certify there appeared before me this 23rd day of October,
2001,  Gregory A. Roemhild, who executed the foregoing instrument
in said capacity.

                              /s/ Constance M Roemhild
                                   Notary Public

[notary seal]

WITNESS 1:                       WITNESS 2:

By: /s/ Philip N Kluge           By: /s/ Darlene Emerson

(Print Name & Address below)     (Print Name & Address below)

     Philip N Kluge                   Darlene Emerson
     115 Keller Ave N                 1402 85th Ave
     Amery, WI  54001                 Amery, WI  54001

Co-Tenant Initial:/s/ GAR
Co-Tenancy Agreement for Champp's Americana Restaurant, Livonia, MI

        AEI Income & Growth Fund XXI Limited Partnership
        By: AEI Fund Management XXI, Inc., its corporate general
            partner

        By: /s/ Robert P Johnson
                Robert P. Johnson, its President

State of Minnesota )
                                    ) ss.
County of Ramsey )

I,  a Notary Public in and for the state and county of aforesaid,
hereby  certify  there  appeared  before  me  this  16th  day  of
November,  2001,  Robert  P.  Johnson,  President  of  AEI   Fund
Management XXI, Inc., the corporate general partner of AEI Income
& Growth Fund XXI Limited Partnership, who executed the foregoing
instrument in said capacity and on behalf of the corporation.

                                   /s/ Debra A Jochum

                                       Notary Public

[notary seal]

WITNESS 1:                       WITNESS 2:

By: /s/ Brent D Cook             By: /s/ Elizabeth Schulte

(Print Name & Address below)     (Print Name & Address below)

     Brent D Cook                     Elizabeth Schulte
     30 E 7th St                      30  E 7th St., St. Paul, MN
     St. Paul, MN  55101              55101

       The name of the party who drafted this document is:
   AEI Fund Management, Inc., 1300 World Trade Center, 30 East
               Seventh Street, St. Paul, MN 55101
                          651-227-7333

Co-Tenant Initial:/s/ GAR
Co-Tenancy Agreement for Champp's Americana Restaurant, Livonia, MI

                           EXHIBIT "A"

     Unit 3, Pentagon Centre Condominium, according to the Master
     Deed  recorded  in Liber 29370, Pages 706 through  766  1/2,
     both  inclusive, as amended by First Amendment to the Master
     Deed  recorded in Liber 29631, Pages 1995 through 2003, both
     inclusive, as amended by Second Amendment to the Master Deed
     recorded  in  Liber  29696,  Pages  571  through  577,  both
     inclusive, as amended by Third Amendment to the Master  Deed
     recorded  in  Liber  29805,  Pages  766  through  767,  both
     inclusive, and as amended by Fourth Amendment to the  Master
     Deed  recorded  in  Liber 31338, Pages  1  through  4,  both
     inclusive,  Wayne  County Records, and designated  as  Wayne
     County  Condominium Subdivision Plan No. 437, together  with
     rights   in  general  common  elements  and  limited  common
     elements,  as  set  forth in the above Master  Deed  and  as
     described in Act 229 of the Public Acts of 1963, and Act  59
     of the Public Acts of 1978, as amended.

     19470 Haggerty

     Tax I.D. No. 46-023-01-0003-000

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