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EXHIBIT 4(b).1

Amendment to Savings & Investment Plan of E. I. du Pont de Nemours and Company effective January 1, 2007

The Savings & Investment Plan of E. I. du Pont de Nemours and Company is amended by adding the
following sentence to the end of Article II thereof:

     “Notwithstanding any provision of this Plan to the contrary, an individual hired, or re-hired,
on or after January 1, 2007, by E. I. du Pont de Nemours and Company, DuPont Performance
Elastomers, L. L. C., Magellan Systems International, L. L. C., or Du Pont Vespel Parts & Shapes
shall not be eligible to participate in the Plan”.exv4wxbyw3

 

EXHIBIT 4(b).3

Description of Amendment to DuPont Salary Deferral & Savings Restoration Plan effective January 1, 2007

The DuPont Salary Deferral & Savings Restoration Plan was amended effective January 1, 2007 to
provide that an individual hired, or re-hired, on or after January 1, 2007, by E. I. du Pont de
Nemours and Company, DuPont Performance Elastomers, L. L. C., Magellan Systems International, L. L.
C., or Du Pont Vespel Parts & Shapes shall not be eligible to participate in the plan,
notwithstanding any provisions of this plan to the contrary.exv4wxbyw4

 

EXHIBIT 4(b).4

DuPont
Retirement Savings Plan: Excerpt from Enrollment Booklet

DuPont Retirement

Savings Plan

Eligibility

As a DuPont employee or employee of a participating subsidiary, you are immediately eligible to
participate in the DuPont Retirement Savings Plan.

Enrollment

Contact Merrill Lynch to enroll in the Plan, and to elect how much
you want to contribute and how you want
it to be invested. You can enroll by logging on to Benefits OnLine at www.benefits.ml.com or
calling the Retirement Service Center at (877) 337-5267. (For more about enrollment, see page 11.)

Your Contributions

Before-tax Contributions: You can authorize from 1% to 100% of your eligible compensation (as
described in the Plan) to be deducted from your paychecks on a before-tax basis.

After-tax Contributions: You can also authorize from 1% to 100% of your eligible compensation to be
deducted from your paychecks on an after-tax basis.

Your combined before-tax and after-tax contributions cannot exceed 100% of your eligible
compensation.

The percentage(s) you elect will be applied to your total eligible pay, but contributions will be
withheld only to the extent money is left after other deductions, such as taxes, contributions to
BeneFlex, and other employer plans, loan repayments, and union dues. You may change your
contribution rates on any day.

Note that if you do not make any election, either to participate in the Plan or not, you will be
enrolled automatically (see More About Enrollment section on page 11 for details).

Company Contributions

 

Company Match: Your employer will match 100% of your before-tax and/or after-tax contributions, up
to 6% of eligible compensation.

Retirement Savings: Your employer is also making Retirement Savings contributions on your behalf.
The Retirement Savings contribution is currently 3% of eligible pay, contributed to your account
monthly.

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Plan Limits

Contributions, both yours and your employer’s, are subject to certain limitations under federal tax
law, including an annual maximum limit on your before - tax contributions ($15,500 for 2007). If you
are age 50 or older during the calendar year and make the maximum allowable contribution to the
plan, you are entitled to make an additional “catch-up” contribution to help make up for smaller
contributions you may have made earlier in your career. The maximum catch-up contribution is
$5,000 for 2007.

For 2007, annual additions to plan (including both employee and employer contributions and
forfeitures) may be as high as $45,000 (or 100% of compensation, if less). If you are age 50 or older,
this limit is increased by the maximum allowable catch-up contribution.

After-tax contributions for highly compensated employees may be limited by the Plan administrator
to pass certain IRS fairness tests.

More About Enrollment

If you take no action, you will automatically be enrolled in the Retirement Savings Plan at a 3%
deferral rate on a before-tax basis, and your assets will be invested in the Moderate Asset
Allocation Portfolio (see page 27). Your automatic plan enrollment also includes automatic
increases in before-tax contribution of 1% annually, up to a maximum of 6% of pay. If you do not
elect either to contribute or not to participate within 60 days from your date of hire, you will be
considered to have elected to contribute at the 3% deferral rate, with 1% annual increases.

You may
make changes to these automatic elections or elect not to participate at any time by
logging on to Benefits OnLine at www.benefits.ml.com or calling the Retirement Service Center at
(877) 337-5267.

You’ll receive a confirmation statement when you enroll and whenever you make changes to your
elections. After your elections take effect, all Plan provisions will apply to the withdrawal and
distribution of your account, including any tax penalties.

Rollovers

Rollovers from another retirement plan or IRA may be accepted by the Plan.

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Investment Direction

You give investment directions for your Plan account by selecting from investment choices provided
under the Plan. If you are enrolled automatically, your account will be invested in the Moderate
Asset Allocation Portfolio. The Investments section of this brochure beginning on page 18 describes
the Plan’s investment options.

As a plan participant, you may change the way your future contributions are invested as frequently
as once each business day. In addition, you may transfer your accumulated savings from one
investment option to another once each business day as well, subject to certain restrictions.
Transactions may be made by accessing your account using Benefits OnLine at www.benefits.ml.com, or
by calling the Retirement Service Center at (877) 337-5267.

Please be aware that mutual fund companies can decide, on a fund-by-fund basis, to impose a trading
restriction or a “redemption fee” for selling shares of a fund before meeting a holding period set
by the fund company. More about trading restrictions and redemption fees can be found on page 15,
but see below for the funds in the Plan affected by these restrictions.

Funds
affected by trading restrictions:

	 	•	 	BlackRock Global Growth Fund (Class I Shares)
	 
	 	•	 	BlackRock International Value Fund (Class I Shares)
	 
	 	•	 	Merrill Lynch International Index Trust

Plan account holders who purchase an interest (invest) in one of these funds must hold that
interest for at least 15 trading days. Account holders who sell an
interest in the fund (e.g., transfer assets to another fund) may not
purchase any additional interest in that same fund for
15 trading days.

Funds
affected by redemption fees:

	 	•	 	Franklin Balance Sheet Investment Fund (Advisor Class)
	 
	 	•	 	Franklin Growth Fund (Advisor Class)
	 
	 	•	 	Franklin Small-Mid Cap Growth Fund (Advisor Class)
	 
	 	•	 	Templeton Foreign Fund (Advisor Class)
	 
	 	•	 	Templeton Growth Fund (Advisor Class)

Plan
account holders who purchase an interest (invest) in one of
these funds and liquidate (sell) within 7 days are subject to a 2% redemption fee.

You will be notified of any change in these controls or fees. The Plan may also restrict trading in
other funds for a participant whose trading becomes disruptive.

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Diversification of Investments and Company Stock

Federal law provides specific rights concerning investments in employer securities (company stock).
Because you may now or in the future have investments in company stock under the Retirement Savings
Plan of E. I. du Pont de Nemours & Company, you should take the time to read this notice carefully. The
Pension Protection Act of 2006 requires all plans that offer employer stock as an investment option to
provide this notice. This requirement applies to all plans, even plans such as the DuPont Retirement
Savings Plan that do not require any investment in employer stock.

Your Rights Concerning Employer Securities

The Plan
allows you to elect to move any portion of your account that is invested in company stock from
that investment into other investment alternatives under the Plan at any time. This right extends
to all of the company stock held under the Plan. You may contact Merrill Lynch by calling (877)
337-5267 or by visiting their Web site at www.benefits.ml.com for specific information regarding
this right, including how to make this election. In deciding whether to exercise this right, you
will want to give careful consideration to the information below that describes the importance of
diversification. All of the investment options under the Plan are available to you if you decide to
diversify out of company stock.

The importance of Diversifying Your Retirement Savings

To help you achieve long-term retirement security, you should give careful consideration to the
benefits of a well-balanced and diversified investment portfolio. Spreading your assets among
different types of investments can provide growth potential, while lowering your overall risk of
losing money. This is because market or other economic conditions
that cause one category of assets, or one particular security, to
perform well often cause another asset category, or
another particular security, to perform poorly. If you invest more than 20% of your retirement
savings in any one company or industry, your savings may not be properly diversified. Although
diversification does not ensure a profit and is not a guarantee against loss, it is an effective
strategy to help you manage investment risk.

In deciding how to invest your retirement savings, you should take into account all of your
assets, including any retirement savings outside of the Plan. No single approach is right for
everyone because, among other factors, individuals have different financial goals, different time
horizon for meeting their goals, and different tolerances for risk. Therefore, you should carefully
consider the rights described in this notice and how these rights affect the amount of money that
you invest in company stock through the Plan. It is also important to periodically review your
investment portfolio, your investment objectives, and the investment options under the Plan to help
ensure that your investment choices remain appropriate for your risk tolerance and your retirement
goals.

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Section 404(c) of the Employee Retirement Income Security Act of 1974 (ERISA)

The DuPont Retirement Savings Plan (“RSP”) is intended to comply with section 404(c) of the
Employee Retirement Income Security Act of 1974 (“ERISA”). This means that the Plan permits
participants to direct the investment of their plan accounts, and, as long as the Plan satisfies
the requirements of section 404(c), the parties that otherwise would
be responsible for investment
decisions are protected from liability if any losses occur as a result of participants’ directions.
To comply with section 404(c), the Plan must permit you to choose from among a broad range of
investment options and must provide certain information about the
Plan and the investment options. In addition to the information in this booklet, you may request the following
information:

	 	•	 	a description of the annual operating expenses of any of the investment options
that reduce the rate of return
	 
	 	•	 	copies of any prospectuses, financial statements, and any other materials
provided to the Plan in connection with the investment options
	 
	 	•	 	a list of the identity and value of assets in the portfolio of each investment
option that is not a mutual fund, including, for any fixed rate
insurance contracts issued by a bank or insurance company, the name
of the insurer and the term and rate of the contract 
	 
	 	•	 	information on the value of shares or units in each
investment option, the past and present performance of the option, and the
value of shares held in your account

All sales
and exchange fees normally associated with any of the mutual funds and collective trusts
offered through the Plan are waived for participants. However, you do pay fees for all the
investment options offered in the Plan, including investment management fees, commissions for
buying and selling DuPont stock, dividend reinvestment fees and rebalancing fees for the asset
allocation funds. A portion of the mutual fund investment management fees is paid to Merrill Lynch
to pay for recordkeeping service for the Plan.

The RSP Investment Committee is the named fiduciary responsible for making sure this information is
provided. To request any of this information, call the Retirement Service Center at Merrill Lynch
at (877)337-5267. The RSP Investment committee may be contacted directly at 1007 Market Street,
Wilmington, DE 19898, (302)774-1000.

Also, you may find the number of shares and value of assets held in your account on your
participant account statement, or obtain it from Merrill Lynch online at www.benefits.ml.com or by
calling the Retirement Service Center.

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Transaction and Redemption Fees and Trading Limitations

Note that a commission of 7 cents per share applies to all purchases and sales of E.I.du Pont de
Nemours and Company common stock.

Additionally,
the Securities and Exchange Commission has taken steps to help discourage the
practice of short-term trading of mutual funds, also called “market timing,” which can hurt fund
performance at the expense of long-term investors. Mutual fund companies can decide, on a
fund-by-fund basis, to impose a trading restriction or a “redemption fee” for selling shares of a
fund before meeting a holding period set by the fund company. All redemption fees go back into the
specific fund affected in each case to help offset the costs incurred by excessive trading.

Three funds in your Plan currently impose trading restrictions, and five funds impose redemption
fees. Other funds could implement these restrictions or fees at some point in the future. For more
about the funds currently affected by these restrictions and fees, see page 12. For further
information, review the funds’ prospectuses, log on to www.benefits.ml.com, or call the Retirement
Service Center at (877) 337-5267.

Voting, Tender and Similar Rights

You will have the right to exercise any voting or tender decisions with respect to mutual fund
shares and DuPont stock held in your account. If there is a voting decision with respect to any
mutual fund, you will receive a proxy from Merrill lynch or directly from the mutual fund sponsor,
along with instructions on how to vote. For DuPont stock, you will receive a proxy card from
Merrill Lynch and you will be asked to return your proxy directly to Merrill Lynch. No one at
DuPont will be able to find out how you vote your shares. The RSP Investment Committee is the
fiduciary responsible for ensuring that these confidentiality procedures are followed. Except for a
tender offer, if you do not return a proxy exercising your DoPont shares, The RSP Investment
Committee will hire Wilmington Trust (or another independent fiduciary) to decide how to vote your
DuPont shares. Wilmington Trust (or the other independent fiduciary) will be the fiduciary
responsible for making voting decisions for shares of DuPont stock for which participant voting
instructions are not exercised. For a tender offer, you are the fiduciary for your shares and if
you do not return a tender election, your nonresponse will be considered an election of the default
option.

Vesting

Your right to your account balance is called vesting. you are always 100% vested in your before-tax
contribution, after-tax contributions, company matching contributions, and any amounts you roll
over to the plan (each as adjusted for any earnings or losses on those contributions). In general,
your company Retirement Savings contributions are vested after three years of company service.

Company
Matching Contributions:

Fully and Immediately Vested

Company Retirement Savings Contributions:

	 	 	 
	Years of Service	 	Vesting Percentage
	Less than 3
	 	0%
	3 or more
	 	100%

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Loans

You will be permitted to borrow against your vested Plan account balance. The maximum amount you

may borrow is the lesser of:

	 	(1)	 	$50,000 minus your highest outstanding loan balance from the Plan during the past
year, or
	 
	 	(2)	 	50% of your vested account balance attributable to your contribution and the company
match, minus any outstanding loan balance you may have.

Retirement Savings Contributions and earnings are not available for loans. The minimum amount
you may borrow is $1,000.

A fee of $150 is assessed for each loan you initiate. Fees are drawn from your Plan account.

You may have two loans outstanding at any time. You can repay each loan by payroll deduction
over a five-year period. You can repay a loan over a period of 10 years if it is for the
purchase of your Principal residence

Withdrawals

You may withdraw your after-tax contributions and/or rollover contributions (adjusted for any
earnings or losses) at any time. Employer Matching Contributions may be withdrawn at age 591/2
or upon separation from service (adjusted for any earnings or losses). However, any earnings in
your after-tax account may be subject to a 10% tax penalty if you take a withdrawal from the
plan prior to age 591/2 .Vested Retirement Savings contributions (adjusted for any earnings and
losses) may not be withdrawn from the plan prior to separation from service.

While the plan is intended to serve you principally as a retirement savings mechanism, you can
withdraw before-tax contributions prior to your separation from service if you experience an
extreme financial hardship. Financial hardships, as defined by the
government, include:

	 	•	 	buying your primary residence;
	 
	 	•	 	paying tuition and related fees for up to one year of post-secondary education for
yourself, your spouse or your dependents;
	 
	 	•	 	paying burial or funeral expenses for your spouse or your dependents;
	 
	 	•	 	paying certain medical expenses for yourself , your spouse or your dependents;
	 
	 	•	 	paying expenses for the repair of damage to your primary residence; or
	 
	 	•	 	preventing eviction from or foreclosure on your primary residence.

Income taxes are due upon withdrawal. You may also be subject to a 10% tax penalty if you take
a withdrawal from the Plan prior to age 591/2 . If you take a hardship withdrawal, you may not
make contributions to the Plan for 6 months.

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Distributions

You and your beneficiary may receive a distribution of your account balance following your
separation from service in a lump sum or installments.

Generally, a distribution can be directly rolled over from the Plan to an IRA or another employer’s
plan that accepts rollovers, which can provide for continued deferral of taxes.

ESOP
Dividends

You may elect to have the dividends paid on your DuPont company stock distributed to you in cash
or reinvested by the Plan in DuPont stock. You can make or change this election by accessing
Benefits OnLine at www.benefits.ml.com or by calling Merrill Lynch at (877) 337-5267. If you do
not make an election, your ESOP dividends will be reinvested in DuPont stock.

Managing Your Account

You will receive a personalized account statement every quarter. The statement shows your account
balance as well as any contributions and investment gains or losses credited to your account during
the reporting period. For your convenience, account statements and confirmations are available
online. If you would like to eliminate hard-copy mailing altogether, log on to Benefits OnLine at
www.benefits.ml.com to choose online delivery. You will then receive an e-mail notification when
your statement and/or confirmation is available online.

This material is only a general outline of the Plan. You are encouraged to read the Summary Plan
Description to obtain more detailed information regarding the Plan’s operation. This document gives
you information you need to make educated decisions about joining the Plan and maintaining a Plan
account. If a provision described in this outline differs from the applicable provision of the Plan
documents, the Plan documents prevail.

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