Assertion: liquefied petroleum gas | /r/CapableOf | introduce amending
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text: ural gas or liquefied petroleum gas for use in vehicles and amending Annexes I, II, III, IV and VI thereto introduced amending and implementing measures in relation to the durability of emission control systems, in-use conformity over a defined useful period and on-board diagnostic (OBD) systems for new heavy duty vehicles and engines.