text: **f)**
  The carrying amounts of the Group’s assets are reviewed at each reporting date to determine whether there is any 
  indication of impairment. Where an indicator of impairment exists, a formal estimate of the recoverable amount is 
  made. 
  
  **Impairment of Non-Financial Assets**
  
  Exploration and evaluation assets are assessed for impairment in accordance with Note 1(b). 
  
  Development and production assets are assessed for impairment on a cash-generating unit basis. A cash-generating 
  unit is the smallest grouping of assets that generates independent cash inflows. Management has assessed its CGUs 
  as being an individual basin, which is the lowest level for which cash inflows are largely independent of those of 
  other assets. Impairment losses recognised in respect of cash-generating units are allocated to reduce the carrying 
  amount of the assets in the unit on a pro-rata basis. 
  
  An impairment loss is recognized in the income statement whenever the carrying amount of an asset or its cash- 
  generating unit exceeds its recoverable amount. 