Section 51A(6) in West Bengal Land Reforms Act, 1955
(6)The certificate of final publication referred to in sub-section (2), or in the absence of such certificate, a certificate signed by the Collector of any district in which the area to which the record-of-rights relates is wholly or partly situate, stating that a record-of-rights has been finally published on a specified date, shall be conclusive proof of such publication and of the date thereof.