Section 37(2)(i) in The Limestone And Dolomite Mines Labour Welfare Fund Rules, 1973
(i)the amount of duty at the rate of ] [forty paise] [ Substituted by G.S.R. 765(E), dated 24.11.2004, for " twenty paise" (w.e.f. 24.11.2004).][per metric tonne of Limestone or Dolomite, as the case may be, produced by the mine less the proportionate cost of recovery; or [Substituted by the Limestone and Dolomite Mines Labour Welfare Fund (Amendment) Rules, 1981 (w.e.f. 12.6.1982). ]