1.13 In return for concessions to the Company, the Civil Aviation Authority has obtained, through revisions to the Company's operating licence, greater oversight of decisions which may carry a financial implication. It also now has stronger ring-fencing of the capital within the business to prevent leakage of funds from NATS' regulated business (the monopoly supplier of en route air traffic control over the UK). NATS is required to notify the CAA on the occurrence of certain events linked to its financial arrangements which might prejudice the financial robustness of NATS' regulated business. These events may include, for example, payment of dividends or commitments arising from NATS' other sources of finance.