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(FIRST NATIONAL BANK LOGO)
    
    PROMISSORY NOTE AND CONTINUING LETTER OF CREDIT AGREEMENT
 TO:
    
    First National BankInternational Trade Services1620 Dodge StOmaha, NE 68197-1111
  TERMS AND CONDITIONS
  1)
    
    Agreement means this Promissory Note and Continuing Letter of Credit Agreement.2)
    
    The Applicant means each party executing this Agreement.3)
    
    Application means each Application for Letter of Credit by the Applicant as such
application may be amended or modified from time to time with the written or oral agreement or
consent of the Applicant.4)
    
    The Bank means The First National Bank.5)
    
    Financing Statement means a Financing Statement or a Statement of Trust Receipt Financing
in the form specified in applicable law.6)
    
    An instrument means any draft, receipt, acceptance or cable or written demand for payment.7)
    
    Note means the Business Promissory Note contained in Section 20 of the Agreement.8)
    
    Property means goods and merchandise and any and all documents relative thereto,
securities, funds, choses in action, and any and all other forms of property, whether real,
personal or mixed and any right or interest therein.9)
    
    Security Agreement means an agreement which creates or provides for a security interest,
including, where applicable law provides therefore, a trust receipt as defined in and
complying with such law.10)
    
    Uniform Customs and Practice means the Uniform Customs and Practice for Documentary Credits
(1993 Revision), International Chamber of Commerce Publication No. 500 and any subsequent
revision thereof approved by a Congress of the International Chamber of Commerce and adhered
to by the Bank.11)
    
    International Standby Practices  ISP 98  means the International Standby Practices  ISP
98, International Chamber of Commerce Publication No.590 and any subsequent revisions thereof
approved by a Congress of the International Chamber of Commerce and adhered to by the Bank.
  1)
    
    The Applicant will reimburse the bank, at its principal office, in cash, the amount required
to pay each instrument, such reimbursement to be made on demand in the case of each sight
draft on receipt, with interest from the date of payment of the instrument to the date of
reimbursement, and not later than one business day prior to maturity in the case of each
acceptance payable at the principal office of the Bank, and in time to reach the place of
payment in the course of ordinary mail not later than one business day prior to maturity in
the case of each acceptance that is not payable at the principal office of the Bank. If the
instrument is in foreign currency, such reimbursement shall be in the United States currency
at the Banks selling rate for cable transfers to the place of payment of the instrument
current on the date of reimbursement or of the Banks settlement of its obligation, as the
Bank may require. If, for any cause, on the date of reimbursement or settlement, as the case
may be, there is no rate of exchange generally current for Bank for effecting such cable
transfers, the Applicant will reimburse the Bank or demand an amount in United States currency
equivalent to the Banks actual cost of settlement of its obligation however or whenever the
Bank shall make such settlement, with interest from the date of settlement to the date of
reimbursement. The Applicant will comply with all governmental exchange regulations now or
hereafter applicable to the Credit or instruments or payments related thereto and will pay the
Bank, on demand, in United States currency, such amount as the Bank may be required to expend
on account of such regulations2)
    
    The Bank may accept or pay any draft presented to it, regardless of when drawn and whether or
not negotiated, if such draft, the other required documents and any transmittal advice are
dated on or before the expiration date of the Credit, and except in so far as instructions may
be given by the Applicant in writing expressly to the contrary with regard to, and prior to,
the Banks issuance of the Credit: (a) although shipment(s) in excess of the quantity called
for under the Credit are made, the bank may honor the relative instrument(s) in an amount or
amounts not exceeding the amount of the Credit; and (b) the Bank may honor, as complying with
the terms of the Credit and of the application therefore, any instruments or other documents
otherwise in order signed or issued by an administrator, executor, trustee in bankruptcy,
debtor in possession, assignee for the benefit of creditors, liquidator, receiver or other
legal representative of the party authorized under the Credit to draw or issue such
instruments or other documents.3)
    
    In the event of any change or modification, with the consent of the Applicant, relative to
the Credit or any instruments or documents called for thereunder, including waiver of
noncompliance of any such instruments or documents with the terms of the




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Credit, these Terms
and Provisions shall be binding upon the Applicant with regard to the Credit as so changed or
modified, and to any action taken by the Bank or any of its correspondents relative thereto.4)
    
    The Uniform Customs and Practice shall be binding on the Applicant and the Bank except to the
extent it is otherwise expressly agreed. It is, also, agreed that: (a) neither the Bank nor
its correspondents shall be responsible for: the validity or sufficiency of any endorsements;
delay in giving or failure to give notice of arrival or any other notice; or failure of any
instrument to bear any reference or adequate reference to the Credit or of documents to
accompany any instrument at negotiation, or failure of any person to note the amount of any
instrument on the reverse of the Credit or to surrender or take up the Credit or to forward
documents in the manner required by the Credit; (b) the occurrence of any one or more of the
contingencies referred to in the Uniform Customs and Practice or in the preceding clauses of
this paragraph shall not affect, impair, or prevent the vesting of any of the Banks rights or
powers hereunder or the Applicants obligation to make reimbursement; (c) the Applicant will
promptly examine (i) the copy of the Credit (and of any amendments thereof) sent to it by the
Bank and (ii) all instruments and documents delivered to it from time to time, and, in the
event of any claim of noncompliance with Applicants instruments or other irregularity, will
immediately notify the Bank thereof in writing, the Applicant being conclusively deemed to
have waived any such claim against the Bank and its correspondents, unless such notice is
given. Any action, inaction or omission on the part of the Bank or any of its correspondents,
under or in connection with the Credit or the relative instruments, documents or property, if
in good faith and in conformity with such foreign or domestic laws, regulations or customs as
the Bank or any of its correspondents may deem to be applicable, shall be binding upon the
Applicant and shall not place the Bank or any of its correspondents under any liability to the
Applicant. The Applicant agrees to hold the Bank and its correspondents indemnified and
harmless against any and all claims, loss, liability or damage, including reasonable counsel
fees, arising from or in connection with the Credit, including any such claim, loss, liability
or damage arising out of any (i) transfer, sale, delivery, surrender or endorsement of any
bill of lading, warehouse receipt or other document at any time(s) held by the Bank, or held
for its account by any of its correspondents, in connection with the Credit and (ii) any
proceedings to enjoin payment under the Credit, whether instituted by Applicant or another
party. The Applicant agrees that such reasonable counsel fees incurred by the bank shall
include, without limitation, counsel fees incurred by the Bank in connection with (i)
determining whether to honor any draft under the Credit, (ii) interpreting any provision
hereof or of the Credit, (iii) any dispute by or among the Applicant, the beneficiary of the
Credit or any other person with respect to this Agreement or the Credit and (iv) reviewing the
form and content of Applications and proposed amendments to this Agreement and the Credit.
The Bank, at its option, may file a Financing Statement, without the signature of the
Applicant, with respect to documents, property and interests relative to the Credit or which
may be held as security hereunder and the Applicant will reimburse the Bank for the filing or
recording fees5)
    
    The Applicant will procure promptly any necessary import, export or other licenses for the
import, export or shipping of the property shipped under or pursuant to or in connection with
the Credit, and will comply with all foreign and domestic governmental regulations in regard
to the shipment of such property or the financing thereof, and will furnish such certificates
in that respect as the Bank may at any time(s) require, and will keep such property adequately
covered by insurance in amounts, against risks and in companies satisfactory to the Bank, and
will assign the policies or certificates of insurance to the Bank, or will make the loss or
adjustment, if any, payable to the Bank, at its option, and will furnish the Bank, on its
demand, with evidence of acceptance by the insurers of such assignment. Should the insurance
upon such property for any reason be unsatisfactory to the Bank, the Bank may, at the
Applicants expense, obtain insurance satisfactory to the Bank.6)
    
    As security for the payment of performance of any and all of the Applicants obligations
and/or liabilities hereunder, absolute or contingent, and also for the payment or performance
of any and all other obligations and/or liabilities, absolute or contingent, due or to become
due, which are now, or may at any time(s) hereafter be owing by the Applicant to the Bank, or
which are now or hereafter existing, the Applicant hereby: (a) recognizes and admits the
Banks ownership in and unqualified right to the possession and disposal of any and all
shipping documents, warehouse receipts, policies or certificates of insurance and other
documents accompanying or relative to instruments drawn under the Credit and in and to any and
all property shipped under or pursuant to or in connection with the Credit, or in any way
relative thereto or to any of the instruments drawn thereunder (whether or not such documents,
goods or other property be released to or upon the order of the Applicant under a security
agreement or bailee receipt), and in and to the proceeds of each and all of the foregoing; (b)
pledges to the Bank and/or gives the bank a general security interest in and/or right of
set-off against, all right, title and interest of the Applicant in and to the balance of every
deposit account, now or at any time hereafter existing, of the Applicant with the Bank, and
any other claims of the Applicant against the Bank, and in and to all property, claims and
demands and rights and interests therein of the Applicant, and in and to all evidences
thereof, which have been or at any time shall be delivered to or otherwise come into the
Banks possession, custody or control, or into the possession, custody or control of any of
its agents or correspondents for account of the Bank for any purpose, whether or not for the
express purpose of being used by the Bank as collateral security or for safekeeping or for any
other or different purpose, the Bank being deemed to have possession, custody or control of
all such property actually in transit to or set apart for the Bank or any of its agents,
correspondents or others acting in its behalf, it being understood that the receipt at any
time by the Bank, or any of its correspondents, of other security, of whatever nature,
including cash, shall not be deemed a waiver of any of the Banks rights or powers hereunder;
(c ) if any party shall have joined in the Application for the Credit, assigns and transfers
to the Bank all right, title and interest of the Applicant in and to all property and
interests which the Applicant may now or hereafter obtain from such party as security for the
obligations of such party arising in connection with the transaction to which the Credit
relates; (d) agrees at any time and from time to time, on demand, to deliver, convey, transfer
or assign to the Bank additional security of a value and character satisfactory to the Bank,
or to make such payment as the Bank may require; and (e) acknowledges that any collateral
pledged to Bank by any other security agreement in existence also constitutes collateral for
the obligation set forth in this agreement.7)
    
    If the bank shall in good faith deem itself insecure at any time, or upon the death of the
Applicant, or if any of the obligation and/or liabilities of the Applicant to the Bank shall
not be paid or performed when due or when demanded, or if the Applicant shall become insolvent
(however such insolvency may be evidenced or defined) or commit any act of bankruptcy or
insolvency, or make a general assignment for the benefit of creditors, or if the Applicant
shall suspend the transaction of its usual business or be expelled or suspended form any
exchange, or if an application is made by any judgement creditor of the Applicant for an order
directing the Bank to pay over money or to deliver other property, or if a petition in
bankruptcy shall be filed by or against the Applicant, or if a petition shall be filed by or
against the Applicant or any proceeding shall be instituted by or against the Applicant for
any relief under any bankruptcy or insolvency laws or any law relating to the relief of
debtors, readjustment of




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indebtedness, reorganization, composition or extensions, or if any
governmental authority, or any court at the instance of any governmental authority, shall take
possession of any substantial part of the property of the Applicant or shall assume control
over the affairs or operations of the Applicant, or if a receiver shall be appointed of, or
writ or order of attachment or garnishment shall be issued or made against, any of the
property or assets of the Applicant, thereupon, unless the Bank shall otherwise elect, any and
all obligations and liabilities of the Applicant to the Bank, whether now existing or
hereafter incurred, shall become and be due and payable forthwith without notice or demand and
Bank shall have all the rights of a secured party provided by applicable laws.8)
    
    The Banks rights and liens hereunder shall continue unimpaired, and the Applicant shall be
and remain obligated in accordance with the terms and provisions hereof, notwithstanding the
release and/or substitution of any property which may be held as security hereunder at any
time(s), or of any rights or interest therein. No delay, extension of time, renewal,
compromise or other indulgence which may occur or be granted by the bank, shall impair the
Banks right or powers hereunder. The Bank shall not be deemed to have waived any of its
rights hereunder, unless the Bank or its authorized agent shall have signed such waiver in
writing. No such waiver, unless expressly as stated therein, shall be effective as to any
transaction which occurs subsequent to the date of such waiver, nor as to any continuance of a
breach after such waiver.9)
    
    If the Applicant is a banking institution, the Applicant hereby appoints the Bank its agent
to issue the Credit in accordance with, and subject to, these Terms and Conditions and the
application for the Credit.10)
    
    If the Applicant is a partnership, the obligations hereof shall continue in force, and apply,
notwithstanding any change in the membership of such partnership, whether arising from the
death or retirement of one or more partners or the accession of one or more new partners.11)
    
    The obligations hereof shall bind the heirs, executors, administrators, successors and
assigns of the Applicant, and all rights, benefits, and privileges hereby conferred on the
Bank shall be and hereby are extended to and conferred upon and may be enforced by its
successors and assigns. This Agreement and all rights, obligations and liabilities arising
hereunder shall be governed by, and construed in accordance with, the laws of the State of
Nebraska.12)
    
    The Applicant, if more than one, shall be jointly and severally liable hereunder (including,
without limitation, under provisions of the Note) and all provisions hereof regarding the
liabilities or security of the Applicant shall apply to any liability or any security of any
or all of them. Each Applicant shall be deemed to be the agent of all others, and, except as
expressly provided otherwise herein, the Bank may act at the direction or request of any one
or more of the Applicants and you may give a notice or notices (whether or not required to be
given), to any one or more of the Applicants, all as the Bank may from time to time elect,
without notice to or approval by the others. The Bank may terminate this Agreement with
respect to, or release or discharge of, any one or more of the Applicants without affecting or
impairing the obligations of the other Applicants. The death, incompetence or dissolution of
any Applicant or any change in the composition of any partnership or any other firm which may
be a party hereto shall not affect in any way the Credit or any rights with respect to
indebtedness incurred under this Agreement or with respect to transactions theretofore
initiated. In this Agreement, the term Applicant refers to any one or more Applicants,
including without limitation, correspondent banks that have executed this Agreement, and each
Applicant shall be deemed a customer of the Bank, without regard to whether any Applicant or
any one of them is specified as the account party on any Credit.13)
    
    This Agreement shall constitute a continuing agreement, applying to all future as well as
existing transactions, whether or not of the character contemplated at the date of this
Agreement, and if all transactions between the Bank and Applicant shall be at any time closed,
shall be equally applicable to any new transactions thereafter. Any provision of the
Agreement which is prohibited or unenforceable in any jurisdiction shall, as to such
jurisdiction, be ineffective to the extent of such prohibition or unenforceable without
invalidating the remaining provisions hereof or affecting the validity or enforceability of
such provision in any other jurisdiction.14)
    
    The Applicant shall compensate the Bank for issuance of each Credit hereunder and the Banks
services in relation thereto in accordance with the Banks written fee schedule, together with
the amount of any and all charges and expenses paid or incurred by Bank or its agents or
correspondents in connection with each Credit. Such fee schedule may be amended by the bank
form time to time upon 30 days notice. The Banks compensation shall be due and payable on
demand and interest shall accrue on unpaid compensation. Wherever in this Agreement interest
shall be required to be paid to the Bank, such interest shall accrue at the lesser of: (a) the
rate of three percent (3%) per annum in excess of the rate in effect from time to time
designated as the First National Banks National Base Rate; or (b) the highest rate allowed by
applicable law.15)
    
    At its option, the Bank may electronically record all telephonic instructions received by the
Bank from the Applicant or any representative thereof, and retain those recordings for 90 days
following the date of instruction to transfer. The purpose of this procedure is to allow the
Bank to recover verbal instructions should any questions arise.16)
    
    This Agreement shall supersede any prior continuing letter of credit agreement entered into
between the Bank and the identical Applicant or Applicants hereto and shall apply to each
Credit heretofore or hereafter issued by the Bank for the account of the same.
 17)
    
    Time is of the essence of this Agreement.18)
    
    This Agreement is executed and is subject to the laws of the State of Nebraska.




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Correspondent/Affiliate
 
 December 19                     , 2006
 Cardinal Ethanol, LLC, an Indiana limited liability company          .

Applicant
 By:
    
    /s/ Troy Prescott
    .Title:
    
    President
    .