Decree-Law No. 137/2006. Country/Territory Portugal Document type Legislation Date 2006 Source FAO, FAOLEX Original source Diário da República, I Série, No. 143, 26 July 2006, pp. 5254-5256. Subject Energy Keyword Energy conservation/energy production Natural gas Inspection Geographical area Europe, Europe and Central Asia, European Union Countries, North Atlantic, North-East Atlantic, Southern Europe Entry into force notes This Decree-Law enters into force 90 days after its publication. Abstract This Decree-Law, composed of 18 articles, defines the conditions applying to natural compressed gas (GNC) for using it as fuel for motorvehicles. In particular, the Decree-Law defines vehicles’ characteristics, installation components, and cars adaptation. Full text Portuguese