Allowance for natural loss in warehoused volatile goods - duty may be remitted when deficiency results from natural loss. Section 70 of the Customs Act permits remission of duty by the Assistant/Deputy Commissioner where warehoused goods are found deficient at delivery due to natural loss. A notification under the provision specifies volatile goods eligible for such remission-including certain fuels and solvents kept in tanks, wine and spirits in casks, liquid helium in containers, and crude in caverns-based on the volatility of the goods and the manner of their storage.