Annual Report 2023

BDO Audit Pty Ltd ABN 33 134 022 870 is a member of a national association of independent entities which are all members of BDO Australia Ltd ABN 77 050 110 275, an Australian company limited by guarantee. BDO Audit Pty Ltd and BDO Australia Ltd are members of BDO International Ltd, a UK company limited by guarantee, and form part of the international BDO network of independent member firms. Liability limited by a scheme approved under Professional Standards Legislation. Key audit matters Key audit matters are those matters that, in our professional judgement, were of most significance in our audit of the financial report of the current period. These matters were addressed in the context of our audit of the financial report as a whole, and in forming our opinion thereon, and we do not provide a separate opinion on these matters. In addition to the matter described in the Material uncertainty related to going concern section, we have determined the matters described below to be the key audit matters to be communicated in our report. Recoverability of exploration and evaluation assets Key audit matter How the matter was addressed in our audit Refer to Note 10 in the financial report The Group has capitalised exploration and evaluation assets in relation to the application of the Group’s accounting policy for exploration and evaluation assets. The recoverability of exploration and evaluation assets is a key audit matter due to: • The significance of the total balance; and • The level of procedures undertaken to evaluate management’s application of the requirements of AASB 6 Exploration for and Evaluation of Mineral Resources (‘AASB 6’) in light of any indicators of impairment that may be present. Our procedures included but were not limited to the following: • Obtaining evidence that the Group has valid rights to explore in the areas represented by the capitalised exploration and evaluation expenditure by obtaining supporting documentation such as tenement searches and considering whether the Group maintains the tenements in good standing; • Tested a sample of capitalised exploration expenditure during the year to ensure it meets the recognition criteria under AASB 6; • Making enquiries of management with respect expenditure during the year to ensure it meets the recognition criteria under AASB 6; • Making enquiries of management with respect to the status of ongoing exploration programs in the respective areas of interest and assessing the Group’s cash flow forecast for the level of budgeted spend on exploration projects; • Enquiring of management, reviewing ASX announcements and reviewing directors’ minutes to ensure that the Group had not decided to discontinue activities in any applicable areas of interest and to assess whether there are any other facts or circumstances that existed to indicate impairment testing was required; and • Review budgets and evaluated assumptions made by the entity to ensure that substantive expenditure on further exploration for and evaluation of the mineral resource in the areas of interest were planned. Independent Auditor’s Report continued 62 Sunstone Metals Limited Annual Report 2023

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