A large number of national and international NGV standards and regulations were surveyed. This has picked up a new discrepancy between ECE R110 and ISO 11439 and FDIS 19078. ECE R110 specifies a 4 year on-board CNG fuel cylinder requalification interval whereas ISO 11439 and FDIS 19078 specify a 3 year interval. This discrepancy should be added to the work program of the harmonisation project.    The gap analysis also took into account ongoing industry issues. The work has identified 30 gaps or issues...

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