Section 2(h) in The Liquefied Petroleum Gas (Regulation of Supply and Distribution) Order, 1993
(h)"liquefied petroleum gas" means a mixture of certain light hydrocarbons which may include propane, isobutane, normal butane, butylenes etc., which are gaseous at normal ambient temperature and atmospheric pressure but may be condensed to liquid state at normal ambient temperature by the application of pressure and which conforms to Indian Standard specification No. IS 4576;
