Document:

<PAGE>   1
                                                                     EXHIBIT 4.7

                              AMENDED AND RESTATED
                              CERTIFICATE OF TRUST
                                       OF
                         EL PASO ENERGY CAPITAL TRUST II

                  THIS AMENDED AND RESTATED CERTIFICATE OF TRUST of El Paso
Energy Capital Trust II (the "Trust") dated as of April 18, 2001, is being duly
executed and filed by the undersigned, as an Administrative Trustee of the
Trust, for purposes of changing the Trust's name from El Paso Energy Capital
Trust II to El Paso Capital Trust II and otherwise restating the Restated
Certificate of Trust of the Trust which was filed on August 3, 1998 with the
Secretary of State of the State of Delaware (the "Restated Certificate"), which
restated the Certificate of Trust of the Trust which was filed on December 11,
1997 to form the Trust as a business trust under the Delaware Business Trust
Act, 12 Del. C. Sections 3801, et seq., (the "Act").

                  The Restated Certificate is hereby amended and restated in its
entirety to read as follows:

                  1. Name. The name of the Trust is El Paso Capital Trust II.

                  2. Delaware Trustee. The name and business address of the
Delaware trustee of the Trust meeting the requirements of Section 3807 of the
Act are as follows:

                     Chase Manhattan Bank Delaware
                     1201 Market Street
                     Wilmington, Delaware 19801

                  3. Duration of Trust. The Trust, unless terminated earlier,
shall have perpetual existence.

                  4. Effectiveness. This Amended and Restated Certificate of
Trust shall be effective immediately upon filing in the Office of the Secretary
of State of the State of Delaware.

                  IN WITNESS WHEREOF, the undersigned, being an Administrative
Trustee of the Trust, has duly executed this Amended and Restated Certificate of
Trust as of the date first above written.

                                       /s/ C. DANA RICE
                                       ------------------------------
                                       C. Dana Rice
                                       Administrative Trustee
<PAGE>   2

                                    CORRECTED
                              AMENDED AND RESTATED
                              CERTIFICATE OF TRUST
                                       OF
                            EL PASO CAPITAL TRUST II

                  THIS CORRECTED AMENDED AND RESTATED CERTIFICATE OF TRUST of
El Paso Capital Trust II (the "Trust") dated as of April 21, 2001, is being duly
executed and filed by the undersigned, as an Administrative Trustee of the
Trust, for purposes of correcting the Amended and Restated Certificate of Trust
of the Trust filed on April 18, 2001 (the "Restated Certificate"). The
inaccuracy or defect to be corrected is that the Restated Certificate reflected
the name of the Delaware Trustee as Chase Manhattan Bank Delaware and the
Delaware Trustee had filed a Certificate of Amendment in accordance with 12 Del.
C. Section 3807(e) reflecting a change in the name of the Delaware Trustee to
Chase Manhattan Bank USA, National Association. The Corrected Restated
Certificate of Trust is set forth in its entirety below.

                  The Restated Certificate is hereby amended and restated in its
entirety to read as follows:

                  1.  Name.  The name of the Trust is El Paso Capital Trust II.

                  2.  Delaware Trustee.  The name and business address of the
Delaware trustee of the Trust meeting the requirements of Section 3807 of the
Act are as follows:

                           Chase Manhattan Bank USA, National Association
                           1201 Market Street
                           Wilmington, Delaware 19801

                  3.  Duration of Trust.  The Trust, unless terminated earlier,
shall have perpetual existence.

                  4.  Effectiveness.  This Amended and Restated Certificate of
Trust shall be effective immediately upon filing in the Office of the Secretary
of State of the State of Delaware.

                  IN WITNESS WHEREOF, the undersigned, being an Administrative
Trustee of the Trust, has duly executed this Corrected Amended and Restated
Certificate of Trust as of the date first above written.

                                                  /s/ JEFFREY I. BEASON
                                                 ------------------------------
                                                 Jeffrey I. Beason
                                                 Administrative Trustee<PAGE>   1
                                                                  EXHIBIT 4.10

                    SECOND AMENDMENT TO DECLARATION OF TRUST

                  THIS SECOND AMENDMENT TO DECLARATION OF TRUST, dated as of
April 18, 2001 (the "Second Amendment"), is among El Paso Corporation, a
Delaware corporation ("El Paso" or "Sponsor"), Chase Manhattan Bank USA,
National Association (as successor by merger to Chase Manhattan Bank Delaware),
as Delaware trustee (the "Delaware Trustee"), and the administrative trustees
named on the signature page hereto (the "Administrative Trustee"), and amends to
the extent specified below the Declaration (as defined herein).

                                   WITNESSETH:

                  WHEREAS, El Paso Natural Gas Company ("EPNG"), the Delaware
Trustee and the Administrative Trustees are parties to that certain Declaration
of Trust of El Paso Energy Capital Trust II (the "Trust") dated as of December
11, 1997 (the "Declaration"); and

                  WHEREAS, the Declaration was amended pursuant to the First
Amendment to Declaration of Trust (the "First Amendment"), dated as of August 5,
1998, to substitute El Paso for EPNG as sponsor of the Trust; and

                  WHEREAS, the parties hereto desire to amend the Declaration in
order to change the name of the Trust to El Paso Capital Trust II; and

                  WHEREAS, the entry into this Second Amendment by the parties
hereto is in all respects authorized by the provisions of the Declaration; and

                  WHEREAS, all things necessary to make this Second Amendment a
valid agreement according to its terms have been done.

                  NOW, THEREFORE, for and in consideration of the premises, El
Paso, the Delaware Trustee and the Administrative Trustees mutually covenant and
agree for the equal and proportionate benefit of the respective Holders from
time to time of the Trust Securities as follows:

                                    ARTICLE 1

                  Section 1.01 Change of Name. The name of the Trust is hereby
changed to El Paso Capital Trust II and all business of the Trust shall
hereinafter be conducted under such name.

<PAGE>   2

                                    ARTICLE 2

                                  Miscellaneous

                  Section 2.01. Other Terms of Declaration. Except insofar as
herein otherwise expressly provided, all the provisions, terms and conditions of
the Declaration as modified by the First Amendment are in all respects ratified
and confirmed and shall remain in full force and effect.

                  Section 2.02. Terms Defined. All terms defined elsewhere in
the Declaration shall have the same meanings when used herein.

                  Section 2.03 Multiple Counterparts. This Second Amendment may
be executed in any number of counterparts, each of which shall be deemed to be
an original for all purposes, but such counterparts shall together be deemed to
constitute but one and the same instrument.

                  Section 2.04. Responsibility of Delaware Trustee. The recitals
contained herein shall be take as the statements of El Paso, and the Delaware
Trustee assumes no responsibility for the correctness of the same. The Delaware
Trustee makes no representations as to the validity or sufficiency of this
Amendment.

                      [signatures follow on separate pages]

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                  IN WITNESS WHEREOF, this Second Amendment has been duly
executed by El Paso, the Delaware Trustee and the Administrative Trustees
effective as of the day and year first written above.

                                EL PASO CORPORATION,
                                As sponsor of El Paso Energy Capital Trust II

                                By:    /s/ H. BRENT AUSTIN
                                   -------------------------------------------

                                    Name:  H. Brent Austin

                                         -------------------------------------

                                    Title: Executive Vice President
                                          ------------------------------------

                                CHASE MANHATTAN BANK USA, National Association
                                (as successor by merger to Chase Manhattan
                                Bank Delaware), as Delaware Trustee

                                By:    /s/ DENIS KELLY
                                   -------------------------------------------

                                    Name:  Denis Kelly
                                         -------------------------------------

                                    Title: Assistant Vice President
                                          ------------------------------------

                                /s/ H. BRENT AUSTIN
                                ----------------------------------------------
                                H. Brent Austin, as Administrative Trustee

                                /s/ JEFFREY I. BEASON
                                ----------------------------------------------
                                Jeffrey I. Beason, as Administrative Trustee

                                /s/ C. DANA RICE
                                ----------------------------------------------
                                C. Dana Rice, as Administrative Trustee

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