This is the first edition of CSA/ANSI LNG 3.1, Road vehicles - Liquefied natural gas (LNG) fuel system components - Part 1: General requirements and definitions, which is an adoption, with North American deviations, of the identically titled ISO (International Organization for Standardization) Standard 12614-1 (first edition, 2014-07-01). At the time of publication, ISO 12614-1:2014 is available from ISO in English only. CSA Group will publish the French version when it becomes available from ISO. For brevity, this Standard will be referred to as "CSA/ANSI LNG 3.1" throughout. The North American deviations are intended to a) correct inaccuracies; and b) replace references to ISO and IEC Standards with references to U.S. and CSA Group Standards, where applicable.