The document discusses the roles and functions of the Tanzania Minerals Audit Agency (TMAA) in auditing Tanzania's mining sector. Specifically: 1. TMAA conducts physical audits of mineral production and exports to verify quantities, qualities, and ensure accurate royalty payments. This protects investors. 2. TMAA performs financial audits and tax reviews of mining companies to ensure accurate revenue and expenditure reporting, and compliance with tax laws. This broadens tax revenue and provides a predictable fiscal regime for investors. 3. TMAA monitors company environmental practices through site inspections and reviews of environmental plans, to help investors mitigate risks while ensuring environmental stewardship.