title: Compulsory stock obligation
text: # Compulsory stock obligation
  
  In the UK, a compulsory stock obligation (CSO) is a minimum stock of fuel reserves that must be held by a supplier in the United Kingdom against shortages or interruptions in supply. The scheme is administered by the Department of Trade and Industry (DTI).
  
  Companies incur an obligation if they are a supplier of a volume of 100,000 tonnes of fuel per annum or greater. This obligation is assessed as being a holding of 67.5 days' stock (50 days for the UK).
  
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