text: The Santos Group has certain obligations to perform minimum exploration work and expend 
  minimum amounts of money pursuant to the terms of the granting of petroleum 
  exploration permits in order to maintain rights of tenure. These commitments may be 
  varied as a result of renegotiations of the terms of the exploration permits, licences or 
  contracts or alternatively upon their relinquishment. The minimum exploration 
  commitments are less than the normal level of exploration expenditures expected to be 
  undertaken by Santos Ltd and its controlled entities. 
  
  **(c) Lease commitments**
  Operating leases: 
  
  Due not later than one year 
  Due later than one year but not later than five years 
  Due later than five years 