law: 83. Examination of sinking fund.-
  (1) A sinking fund established for the liquidation of any loan shall be subject to annual examination by such person as may be appointed by the Central Government in this behalf, and the person so appointed shall ascertain whether the cash and the current market value of the securities at the credit of the fund are actually equal to the amount which would have been accumulated had investments been regularly made and had the rate of interest as originally estimated been obtained thereon.
  (2) A Board shall pay forthwith into the sinking fund any amount which the person appointed under sub-section (1) to conduct the annual examination of the fund may certify to be deficient, unless the Central Government specifically sanctions a gradual readjustment.
  (3) If the cash and the current market value of the securities at the credit of a sinking fund are in excess of the amount which should be at its credit, the person appointed under sub-section (1) shall certify the amount of this excess, and the Board may, with the previous sanction of the Central Government,-
  (a) withdraw the whole or any part of the certified excess in which case the Trustees in whose names the sinking fund is invested under sub-section (1) of section 82, shall forthwith transfer securities of the requisite current market value, or cash and securities of the requisite current market value, to the Board, or
  (b) reduce or discontinue the half-yearly contributions to the sinking fund required under section 81, or
  (c) adopt a combination of these measures.