"12. Section 45A provides for determination of contributions in certain cases. When the records are not produced by the establishment before the Corporation and when there is no cooperation, the Corporation has got the power to make assessment and determine the amount under Section 45A and recover the said amount as arrears of land revenue under Section 45B of the Act. This is in the nature of a best judgment assessment as is known in taxing statutes. When the Corporation passes an order under Section 45A, the said order is final as far as the Corporation is concerned. Under Section 45A(1), the Corporation, by an order, can determine the amount of contributions payable in respect of the employees where the employer prevents the Corporation from exercising its functions or discharging its duties under Section 45, on the basis of the material available to it, after giving reasonable opportunity. But, where the records are produced, the assessment has to be made under Section 75(2)(a) of the Act. Section 45A(2) provides that the order under Section 45A(1) shall be used as sufficient proof of the claim of the Corporation under Section 75 or for recovery of the amount determined by such order as arrears of land revenue under Section 45B. In other words, when there is a failure in production of records and when there is no cooperation, the Corporation can determine the amount and recover the same as arrears of land revenue under Section 45B. But, on the other hand, if the records are produced and if there is cooperation, the assessment has to be
