Common use of Obligation to Guarantee Clause in Contracts

Obligation to Guarantee. If at any time any of the Company's 6.50% Senior Notes due 2008, 9-5/8% Senior Notes due 2010, 7.50% Senior Notes due 2012 (the "7.50% Notes") or 7.20% Senior Notes due 2028 (all of such senior notes, collectively, the "Other Senior Notes") are guaranteed by the Guarantor pursuant to the terms of the Indenture or any applicable supplemental indenture related to such senior notes, then the Company, the Guarantor and the Trustee shall as soon as reasonably practicable thereafter execute and deliver a supplemental indenture to the Indenture pursuant to which the Guarantor shall unconditionally guarantee the Notes on substantially the same terms as the Guarantor shall have guaranteed the 7.50% Notes; provided, however, that if the Guarantor is not required to guarantee the 7.50% Notes or if the 7.50% Notes are no longer outstanding, then the Guarantor shall guarantee the Notes on substantially the same terms as the most recently issued series of Other Senior Notes that are guaranteed. The Company, the Guarantor and the Trustee, as applicable, also shall execute and deliver such other documents, instruments or certificates as are reasonably necessary or appropriate to effect the required guarantee of the Notes.

Obligation to Guarantee. If at any time any of the Company's 8 1/4% Senior Notes due 2007, 6.50% Senior Notes due 2008, 9-5/85.875% Senior Notes due 20102012, 7.505.875% Senior Notes due 2012 (the "7.502016, 6.875% Notes") Senior Notes due 2018 or 7.20% Senior Notes due 2028 (the "7.20% Notes," and collectively with all of such other senior notes, collectively, the "Other Existing Senior Notes") are guaranteed by the Guarantor pursuant to the terms of the Indenture or any applicable supplemental indenture related to such senior notes, then the Company, the Guarantor and the Trustee shall as soon as reasonably practicable thereafter execute and deliver a supplemental indenture to the Indenture pursuant to which the Guarantor shall unconditionally guarantee the Notes on substantially the same terms as the Guarantor shall have guaranteed the 7.507.20% Notes; provided, however, that if the Guarantor is not required to guarantee the 7.507.20% Notes or if the 7.507.20% Notes are no longer outstanding, then the Guarantor shall guarantee the Notes on substantially the same terms as the most recently issued series of Other Existing Senior Notes that are guaranteed. The Company, the Guarantor and the Trustee, as applicable, also shall execute and deliver such other documents, instruments or certificates as are reasonably necessary or appropriate to effect the required guarantee of the Notes.

Obligation to Guarantee. If at any time any of the Company's 6.50’s 5.875% Senior Notes due 20082012, 9-5/85.875% Senior Notes due 20102016, 7.506.65% Senior Notes due 2012 (the "7.502017, 6.875% Notes") or Senior Notes due 2018, 7.20% Senior Notes due 2028 or 2.875% Convertible Senior Notes due 2038 (the “2.875% Notes,” and collectively with all of such other senior notes, collectively, the "Other “Existing Senior Notes"”) are guaranteed by the Guarantor pursuant to the terms of the Indenture indentures under which such Existing Senior Notes were issued or any applicable supplemental indenture related to such senior notesExisting Senior Notes, then the Company, the Guarantor and the Trustee shall as soon as reasonably practicable thereafter execute and deliver a supplemental indenture to the Indenture pursuant to which the Guarantor shall unconditionally guarantee the Notes on substantially the same terms as the Guarantor shall have guaranteed the 7.50% such Existing Senior Notes; provided, however, that if the Guarantor is not required to guarantee the 7.502.875% Notes or if the 7.502.875% Notes are no longer outstanding, then the Guarantor shall guarantee the Notes on substantially the same terms as the most recently issued series of Other Existing Senior Notes that are guaranteed. The Company, the Guarantor and the Trustee, as applicable, also shall execute and deliver such other documents, instruments or certificates as are reasonably necessary or appropriate to effect the required guarantee of the Notes.

Obligation to Guarantee. If at any time any of the Company's 8 1/4% Senior Notes due 2007, 6.50% Senior Notes due 2008, 9-5/85.875% Senior Notes due 20102012, 7.505.875% Senior Notes due 2012 (the "7.50% Notes") 2016 or 7.20% Senior Notes due 2028 (the "7.20% Notes," and collectively with all of such other senior notes, collectively, the "Other Senior Notes") are guaranteed by the Guarantor pursuant to the terms of the Indenture or any applicable supplemental indenture related to such senior notes, then the Company, the Guarantor and the Trustee shall as soon as reasonably practicable thereafter execute and deliver a supplemental indenture to the Indenture pursuant to which the Guarantor shall unconditionally guarantee the Notes on substantially the same terms as the Guarantor shall have guaranteed the 7.507.20% Notes; provided, however, that if the Guarantor is not required to guarantee the 7.507.20% Notes or if the 7.507.20% Notes are no longer outstanding, then the Guarantor shall guarantee the Notes on substantially the same terms as the most recently issued series of Other Senior Notes that are guaranteed. The Company, the Guarantor and the Trustee, as applicable, also shall execute and deliver such other documents, instruments or certificates as are reasonably necessary or appropriate to effect the required guarantee of the Notes.

Obligation to Guarantee. If at any time any of the Company's 6.50’s 5.875% Senior Notes due 20082016, 9-5/86.65% Senior Notes due 20102017, 6.875% Senior Notes due 2018, 7.50% Senior Notes due 2012 (the "7.502020, 3.95% Notes") Senior Notes due 2022 or 7.20% Senior Notes due 2028 (all of such senior notes, collectively, the "Other “Existing Senior Notes"”) are guaranteed by the Guarantor pursuant to the terms of the Indenture indentures under which such Existing Senior Notes were issued or any applicable supplemental indenture related to such senior notesExisting Senior Notes, then the Company, the Guarantor and the Trustee shall as soon as reasonably practicable thereafter execute and deliver a supplemental indenture to the Indenture pursuant to which the Guarantor shall unconditionally guarantee the Notes on substantially the same terms as the Guarantor shall have guaranteed the 7.50% such Existing Senior Notes; provided, however, that if the Guarantor is not required to guarantee the 7.50% Notes or if the 7.50% Notes are no longer outstanding, then the Guarantor shall guarantee the Notes on substantially the same terms as the most recently issued series of Other Senior Notes that are guaranteed. The Company, the Guarantor and the Trustee, as applicable, also shall execute and deliver such other documents, instruments or certificates as are reasonably necessary or appropriate to effect the required guarantee of the Notes.

Obligation to Guarantee. If at any time any of the Company's 6.50% Senior Notes due 2008, 9-5/8% Senior Notes due 2010, 7.50% Senior Notes due 2012 (the "7.50% Notes") ), 5.875% Senior Notes Due 2016, or 7.20% Senior Notes due 2028 (all of such senior notes, collectively, the "Other Senior Notes") are guaranteed by the Guarantor pursuant to the terms of the Indenture or any applicable supplemental indenture related to such senior notes, then the Company, the Guarantor and the Trustee shall as soon as reasonably practicable thereafter execute and deliver a supplemental indenture to the Indenture pursuant to which the Guarantor shall unconditionally guarantee the Notes on substantially the same terms as the Guarantor shall have guaranteed the 7.50% Notes; provided, however, that if the Guarantor is not required to guarantee the 7.50% Notes or if the 7.50% Notes are no longer outstanding, then the Guarantor shall guarantee the Notes on substantially the same terms as the most recently issued series of Other Senior Notes that are guaranteed. The Company, the Guarantor and the Trustee, as applicable, also shall execute and deliver such other documents, instruments or certificates as are reasonably necessary or appropriate to effect the required guarantee of the Notes.

Obligation to Guarantee. If at any time any of the Company's ’s 6.50% Senior Notes due 2008, 9-5/85.875% Senior Notes due 20102012, 7.505.875% Senior Notes due 2012 (the "7.502016, 6.65% Notes") Senior Notes due 2017, 6.875% Senior Notes due 2018 or 7.20% Senior Notes due 2028 (the “7.20% Notes” and collectively with all of such other senior notes, collectively, the "Other “Existing Senior Notes"”) are guaranteed by the Guarantor pursuant to the terms of the Indenture indentures under which such Existing Senior Notes were issued or any applicable supplemental indenture related to such senior notesExisting Senior Notes, then the Company, the Guarantor and the Trustee shall as soon as reasonably practicable thereafter execute and deliver a supplemental indenture to the Original Indenture pursuant to which the Guarantor shall unconditionally guarantee the Notes on substantially the same terms as the Guarantor shall have guaranteed the 7.50% such Existing Senior Notes; provided, however, that if the Guarantor is not required to guarantee the 7.507.20% Notes or if the 7.507.20% Notes are no longer outstanding, then the Guarantor shall guarantee the Notes on substantially the same terms as the most recently issued series of Other Existing Senior Notes that are guaranteed. The Company, the Guarantor and the Trustee, as applicable, also shall execute and deliver such other documents, instruments or certificates as are reasonably necessary or appropriate to effect the required guarantee of the Notes.

Obligation to Guarantee. If at any time any of the Company's 6.50’s 5.875% Senior Notes due 20082016, 9-5/86.65% Senior Notes due 20102017, 6.875% Senior Notes due 2018, 7.50% Senior Notes due 2012 (the "7.50% Notes") or 2020, 7.20% Senior Notes due 2028 or 2.875% Convertible Senior Notes due 2038 (the “2.875% Notes,” and collectively with all of such other senior notes, collectively, the "Other “Existing Senior Notes"”) are guaranteed by the Guarantor pursuant to the terms of the Indenture indentures under which such Existing Senior Notes were issued or any applicable supplemental indenture related to such senior notesExisting Senior Notes, then the Company, the Guarantor and the Trustee shall as soon as reasonably practicable thereafter execute and deliver a supplemental indenture to the Indenture pursuant to which the Guarantor shall unconditionally guarantee the Notes on substantially the same terms as the Guarantor shall have guaranteed the 7.50% such Existing Senior Notes; provided, however, that if the Guarantor is not required to guarantee the 7.502.875% Notes or if the 7.502.875% Notes are no longer outstanding, then the Guarantor shall guarantee the Notes on substantially the same terms as the most recently issued series of Other Existing Senior Notes that are guaranteed. The Company, the Guarantor and the Trustee, as applicable, also shall execute and deliver such other documents, instruments or certificates as are reasonably necessary or appropriate to effect the required guarantee of the Notes.