Decree-Law No. 137/2006. Country/Territory Portugal Document type Legislation Date 2006 Source FAO, FAOLEX Subject Energy Keyword Energy conservation/energy production Natural gas Inspection Geographical area Europe, European Union Countries, 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