Section 2(e) in The Petroleum And Natural Gas Regulatory Board Act, 2006
(e)"auto liquefied petroleum gas" means a mixture of certain light hydrocarbons derived from petroleum, which are gaseous at normal ambient temperature and atmospheric pressure but may be condensed to the liquid state at normal ambient temperature by the application of moderate pressure, and which conform to such specifications for use as fuel in vehicles, as the Central Government may, in consultation with the Bureau of Indian Standards, notify from time to time;
