Minmetals Resources Limited 2011 Sustainability Report (PDF)

2Assurance Provider’s ResponsibilityOur responsibility is to express a limited assurance conclusion on whether the subject matter is presented in accordance withthe criteria. Our limited assurance engagement has been planned and performed in accordance with the InternationalFederation of Accountants’ International Standard on Assurance Engagements 3000: Assurance Engagements Other ThanAudits or Reviews of Historical Financial Information (‘ISAE 3000’), with regard to ICMM’s SD Framework: AssuranceProcedure. Our limited assurance engagement does not include any testing of controls or performing procedures relating tochecking aggregation or calculation of data within IT systems, which would have been performed under a reasonableassurance engagement. We believe that the evidence we have obtained is sufficient and appropriate to provide a basis forour limited assurance conclusions.Level of AssuranceA limited assurance engagement consists of making enquiries and applying analytical and other limited assuranceprocedures. Our procedures were designed to provide a limited level of assurance and as such do not provide all theevidence that would be required to provide a reasonable level of assurance. While we considered the effectiveness ofmanagement’s internal controls when determining the nature and extent of our procedures, our review was not designed toprovide assurance on internal controls. We believe that the evidence we have obtained is sufficient and appropriate toprovide a basis for our limited assurance conclusions.Our ApproachOur procedures performed included, but were not limited to Interviewing a selection of MMG staff and management at both a site and corporate level responsible for subject matterand the preparation of the Report Reviewing the report to determine if material topics and performance issues identified during our procedures had notbeen adequately disclosed Sample testing of reported data, performance statements, claims and case studies included in the subject matter againstsupporting source information, MMG’s reported boundary and GRI’s principles of balance and completeness Sample testing as to whether the methods used for calculating data were not aligned with the stated criteria Reviewing selected management information and documentation supporting assertions made in the subject matter Reviewing MMG policies and standards and assessing alignment with ICMM’s 10 Sustainable Development Principles andother mandatory requirements as set out in ICMM’s Position StatementsInherent LimitationsThere are inherent limitations of any assurance engagement arising from the evidence on which the auditor drawsconclusions upon being persuasive, as it relies on selected data to be representative, rather than conclusive. There areadditional inherent risks associated with assurance over non-financial information including reporting against standardswhich require information to be assured against source data compiled using definitions that are developed by the reportingentity. Finally, principles of materiality and responsiveness are subjective and will be interpreted differently by differentstakeholder groups.Use of Our ReportOur limited assurance report has been prepared for distribution to the management and directors of MMG. We disclaim anyassumption of responsibility for any reliance on this assurance statement or on the subject matter to which it relates, to anyperson other than management and directors of MMG, or for any purpose other than that for which it was prepared.Our Independence and Assurance TeamIn conducting our assurance engagement we have met the independence requirements of the APES 110 Code of Ethics forProfessional Accountants. We have the required competencies and experience to conduct this assurance engagement.Matters relating to electronic presentation of the Sustainability ReportOur review included web-based information that was available via web links as of the date of this statement. We provide noassurance over changes to the content of this web-based information after the date of this assurance statement.Assurance conclusionOn the basis of our procedures for this limited assurance engagement, nothing has come to our attention that causes us tobelieve that subject matter has not been presented in accordance with the criteria.Ernst & YoungMelbourne, 4 May 201280