Section 12A(2) in Coking Coal Mines (Nationalisation) Act, 1972
(2)Every employee to whom the whole or any part of the arrears referred to in sub-section (1) is due shall file the proof of his claim to the Commissioner within such time, after the commencement of the Coking and Non-Coking Coal Mines (Nationalisation) Amendment Act, 1973, as the Commissioner may fix.