§ 7-601 DEFINED.
   For the purpose of this article, the following definition shall apply unless the context clearly indicates or requires a different meaning.
   LIQUEFIED PETROLEUM GASES. Any material which is composed predominately of any of the following hydrocarbons or mixtures of them: propane, propylene, butanes (normal butane or iso-butane) and butylenes.
(2010 Code, § 7-601)