�1��� �Scope
�2��� �References
�3��� �Definitions
�4��� �Error
codes
������ �4.1��� �Assigning
error codes
������ �4.2��� �Error
code descriptions
�5��� �Service change reasons
������ �5.1��� �Assigning service change reasons
������ �5.2��� �Service change reason description