This excerpt taken from the MRO 10-K filed Mar 10, 2005.
Standards of Conduct
To the best of their knowledge and ability, the Senior Financial Officers shall:
All Senior Financial Officers are expected to adhere to both the Marathon Oil Corporation Code of Business Conduct and this Code of Ethics. Any violation of this Code of Ethics will be subject to appropriate discipline, up to and including dismissal from the Company and prosecution under the law. The board of directors shall have the sole and absolute discretionary authority to approve any deviation or waiver from this Code of Ethics for Senior Financial Officers. Any change in or waiver from and the grounds for such change or waiver of this Code of Ethics for Senior Financial Officers shall be promptly disclosed through a filing with the Commission on Form 8-K.
MARATHON OIL CORPORATION CODE OF ETHICS for SENIOR FINANCIAL OFFICERS