Ministry of Coal has decided to switch over from the existing Useful Heat Value -UHV based system of grading and pricing of non-coking coals to fully variable Gross Calorific Value (GCV) based system.The system will come into effect from 1st of January next year. According to the Coal Ministry official, this is an international practice of trading of coal which has been recommended for adoption by a number of high level committees including the integrated Energy Policy Committee.This system will ensure a high degree of consistency in quality of coal supplies and result in high consumer satisfaction.The coal companies have also been advised to gear up themselves for building up required infrastructure for sampling and analysis of coal before dispatch to the consumers in these lines.