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      Confidential Reporting Hotline

      Audit Committee of the Board of Directors
      Procedures for Confidential Anonymous Complaints Regarding Accounting, Internal Accounting Controls and Auditing Matters 

      The Audit Committee of the Board of Directors of Diamond Offshore Drilling, Inc. (the "Company") has established the following procedures for the receipt, retention and treatment of complaints received by the Company regarding accounting, internal accounting controls and auditing matters, including procedures for the confidential, anonymous submission by employees of concerns regarding questionable accounting or auditing matters.

      Any person wishing to communicate such a complaint to the Audit Committee, including a confidential or anonymous complaint by a Company employee, may do so in the following ways:

      • By submitting the complaint in writing addressed to:
        Chairman of the Audit Committee
        c/o General Counsel
        Diamond Offshore Drilling, Inc.
        15415 Katy Freeway
        Houston, Texas 77094 

      • By calling the Company's complaint hotline at the following telephone number: (866) 490-3414 and speaking to a communications specialist employed by an independent third party. Any person calling this hotline number from a country other than the United States must first dial an AT&T access number that is specific to the country from which the call is being made. Attached is a list of AT&T access numbers for countries in which the Company may operate. Please visit  http://www.business.att.com/bt/access.jsp to obtain an AT&T access number for any country that is not included on the attached list.

      • By submitting the complaint online at www.doreportline.com 

      The Company's General Counsel will review all complaints received and those that relate to accounting, internal accounting controls and auditing matters will be promptly forwarded to the Chairman of the Audit Committee. All complaints received by the Audit Committee will be carefully reviewed and, to the extent the Audit Committee deems necessary, investigated under the Audit Committee's supervision. Appropriate corrective action will be taken as warranted in the judgment of the Audit Committee.  

      The Company will not discharge, demote, suspend, threaten, harass or in any manner discriminate or retaliate against any employee in the terms and conditions of employment based upon any lawful actions of such employee with respect to good faith reporting of complaints regarding accounting or auditing matters.