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6.9.2  When notified of a safety-related change, ATSD will take one of four courses of action as described below:
a) simply acknowledge receipt of  the information; in this case the unit may implement the change without further reference to ATSD.
b) elect to audit the change without requiring further authorisation to implement it; in this case the unit may implement the change without further reference to ATSD although additional information may be requested in order to complete the audit.
c) elect to audit the change and require that it is not implemented until the audit is satisfactorily completed. This option may be exercised if the change is substantial or of particular sensitivity.
d) direct that the change not be implemented. This option is only likely to be exercised if the proposed change contravenes legislation or the UK's international obligations.
6.9.3  Planned changes should, therefore, be notified to ATSD as soon as practicable in the change life cycle. This is to ensure, as far as possible, that if a change is selected for audit, the results from the audit are fed back to the unit management at an appropriate point in the life cycle of the change.
6.9.4  For changes associated with ATC procedures, the associated safety assurance documentation should be submitted to ATSD as early as possible but at least 30 days prior to the planned introduction date for the change. The Service Provider remains responsible for the completion of any necessary safety assessment and for the mitigation of any hazards, and for ensuring the safe implementation of any changes (1742).
NOTE:  It is recognised that, in order to ensure the continued safety of the ATC service, certain changes, particularly those associated with ATC procedures, normally documented in SIs and TOIs, may have to be introduced at short notice and preclude the submission of documentation to ATSD 30 days in advance of their implementation. In such circumstances, the relevant documentation should be submitted to ATSD as soon as practicable.
6.9.5  Changes to the operation of the unit that require an amendment to the SMS or safety assurance documentation must be notified to ATSD at least 30 days before the change is scheduled to be implemented (1743).
6.9.6  The exact detail and processes to be used for notification of changes to ATSD by ATCUs will be agreed following consultation and discussion between the unit management and relevant RO.

6.10  Audit Philosophy
6.10.1  The purpose of a regulatory audit is to assess the robustness and effectiveness of the SMS in providing a service that is safe for use by aircraft. This is achieved by ensuring that the operational and management processes and procedures deliver a service that is safe. It also permits assurance to be gained that any safety related change is exposed to a structured hazard/risk assessment process in order to ensure that the change can be implemented whilst maintaining the service that is being provided at an acceptable level of safety.
6.10.2  A regulatory audit takes a sample of the unit's operation. From the audit results, assurance is gained as to the likely safety of the entire ATS provided by the unit. Additional confidence that the sampled elements of the unit reflect the overall safety performance of the unit is gained over a number of consecutive audits of different areas of activity.
6.10.3  The audit will assess whether the SMS addresses relevant safety issues in order to discharge the safety accountabilities of the Service Provider. The SMS is the principal vehicle by which the Service Provider demonstrates its competence, as an organisation, to provide a service that is safe for use by aircraft (as required by Certification, Designation or Approval). See also paragraphs 6.7.3 to 6.7.6 above.
6.10.4  Following completion of the audit, the ATC unit management will be provided with a report detailing the findings. The unit management will be invited to respond to the findings in the report.
　
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本文鏈接地址：CAP 670 Air Traffic Services Safety Requirements 1(35)