The PNGRB has issued a public consultation document for changing the zonal tariffs levied on pipelines that carry natural gas from domestic producing fields or sea ports in the case of imports, to users such as power plants, fertiliser units and city gas entities that sell it as CNG for sale to automobiles or pipe it to household kitchens for cooking purposes. The PNGRB has issued a public consultation document for changing the zonal tariffs levied on pipelines that carry natural gas from domestic producing fields or sea ports in the case of imports, to users such as power plants, fertiliser units and city gas entities that sell it as CNG for sale to automobiles or pipe it to household kitchens for cooking purposes. Zee News :Business