A major concession for Northern Ireland was the reduction to zero of Air Passenger Duty on long-haul flights from the province. In the devolution settlement such burdens were to be born by the Assembly government. But negotiations proved how DUP could sell their support to Whitehall. In 2011, she had written to the Organised Crime Task Force about the need to bring fuel licensing within the remit of the Petrol licensing Consolidation (NI) Act 1929, demonstrating the relevance of cross-border law enforcement jurisdiction in helping to reduce frauds.