KAISER ALUMINUM CORP

Our corporate governance guidelines require that a majority of the members of our board of directors satisfy the independence requirements set forth in the rules of the Nasdaq Stock Market. We refer to these requirements as the general independence criteria. Additionally, the audit committee charter, compensation committee charter and nominating and corporate governance committee charter require that all respective committee members satisfy the general independence criteria. There are no family relationships among our officers or directors.

Based upon information requested from and provided by our directors concerning their backgrounds, employment and affiliations, including family relationships, our board of directors has determined that each of Mmes. Glas, Martin and Sebastian and Messrs. Arnold, Foster, Grimley, Stebbins, Wilcox and Williams, representing nine of our 10 directors, satisfies the general independence criteria. The remaining director, Mr. Harvey, does not meet the independence criteria as our CEO. In making such determination, our board of directors considered the relationships that each of our directors have with our company and all other facts and circumstances our board of directors deemed relevant in determining the independence of each of our directors in accordance with the general independence criteria.