The Borrower shall, and shall cause each Restricted Subsidiary to, cure promptly any defects in the creation and issuance of the Notes and the execution and delivery of the Security Instruments and this Agreement and, subject to the terms of the Intercreditor Agreement and Section 5.11, to ensure that the Administrative Agent has an Acceptable Security Interest in any Property (other than Excluded Property) of the Borrower or any Restricted Subsidiary now owned or hereafter acquired, and further, shall promptly after receipt of a written request from the Administrative Agent, comply with such request; provided that (a) in no event shall the Administrative Agent be permitted to request or the Borrower be required to grant an Acceptable Security Interest in any Oil and Gas Properties that exceeds 90% (by value) (or such greater percentage if required under any First Lien Loan Document or any Second Lien Loan Document) of all of the Borrower’s and its Restricted Subsidiaries’ Proven Reserves and Oil and Gas Properties, and (b) the Borrower shall cause the Administrative Agent to, at all times and without any requirement of a written request from the Administrative Agent, have an Acceptable Security Interest in at least 90% (by value) (or such greater percentage if required under any First Lien Loan Document or any Second Lien Loan Document) of all of the Borrower’s and its Restricted Subsidiaries’ Proven Reserves and Oil and Gas Properties. The Borrower hereby authorizes the Administrative Agent to file (though the Administrative Agent shall have no duty to so file) any financing statements without the signature of the Borrower to the extent permitted by applicable law in order to perfect or maintain the perfection of any security interest granted under any of the Loan Documents. The Borrower at its expense will, and will cause each Restricted Subsidiary (other than any Immaterial Subsidiaries) to, promptly execute and deliver to the Administrative Agent all such other documents, agreements and instruments necessary or reasonably requested by the Administrative Agent to comply with or accomplish the covenants and agreements of the Borrower or any Restricted Subsidiary, as the case may be, in the Security Instruments and this Agreement, or to further evidence and more fully describe the collateral intended as security for the Notes, or to correct any omissions in the Security Instruments, or to state more fully the security obligations set out herein or in any of the Security Instruments, or to perfect, protect or preserve any Liens created pursuant to any of the Security Instruments, or to make any recordings, to file any notices or obtain any consents, all as may be necessary or appropriate in connection therewith or to enable the Administrative Agent to exercise and enforce its rights and remedies with respect to any Collateral.