Division 16 With respect to critical events:

the F1Secretary of State must endeavour to ensure that the unit providing central ATFM develops, maintains and publishes ATFM procedures for handling critical events F2.... ATFM procedures shall set out the actions to be taken by relevant operational stakeholders in the event of a major disruption of a component of the network which would result in significant reduction in capacity or major disruptions of traffic flows, or both;

in the preparation for critical events, ATS units and airport operators, shall coordinate the relevance and content of the contingency procedures with the F3unit providing central ATFM and local ATFM units, aircraft operators affected by critical events, and as appropriate the airport slot coordinators, including any adjustment to priority rules. The contingency procedures shall include:

1. (i)

   organisational and coordination arrangements;

2. (ii)

   ATFM measures to manage access to affected areas to prevent excessive air traffic demand compared with declared capacity of the whole or part of the airspace or airports concerned;

3. (iii)

   circumstances, conditions and procedures for the application of priority rules for flights, which respect F4... essential security or defence policy interests;

4. (iv)

   recovery arrangements.