This excerpt taken from the AWC 20-F filed Jun 19, 2006.
A. Evaluation of Disclosure Controls and Procedures
For its fiscal year 2005, Alumina management, including the Chief Executive Officer and Chief Financial Officer, performed an evaluation of the effectiveness of the design and operation of Aluminas disclosure controls and procedures. Disclosure controls and procedures are designed to ensure that the material financial and non-financial information required to be disclosed in Form 20-F and filed with the U.S. Securities and Exchange Commission is recorded, processed, summarized and reported in a timely manner. The evaluation was performed under the supervision of, and was reviewed by, our Chief Executive Officer and our Chief Financial Officer. In designing and evaluating the disclosure controls and procedures, Alumina management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable, rather than absolute, assurance of achieving the desired control objectives, and management necessarily was required to apply its judgement in evaluating the cost-benefit relationship of the possible controls and procedures. Based on the foregoing, Aluminas management, including Chief Executive Officer and Chief Financial Officer, concluded that Aluminas disclosure controls and procedures were effective as of December 31, 2005.