law: State Bank of India Act, 1955
  4. Authorized capital
  Subject to the provisions of this Act, the authorized capital of
  
  the State Bank shall be twenty crores of rupees divided into 6[two
  
  crores] of fully paid up shares of 7[ten rupees] each :
  Provided that the Central Government may increase or
  
  reduce the authorized capital as it thinks fit so however that the shares in
  
  all cases shall be fully paid up shares of 7[ten rupees] each.