Section 80(5) in West Bengal Contract Labour (Regulation and Abolition) Rules, 1972
(5)Where no deduction or fine has been imposed or no overtime has been worked during any wage period a "nil" entry shall be made across the body of the register at the end of the wage period indicating also in precise terms the wage period to which the "nil", entry relates, in the respective registers maintained in Forms XX, XXI, and XXIII respectively.
