Due to field size constraints in the ITC 2.1 sequence number field, both the ITC 2.1 sequence number field and the corresponding MDP header sequence number will begin anew at 000001 when the ITC 2.1 sequence number field reaches its maximum number of 9999999. 

In anticipation of increasing volumes, please be aware it is possible that this condition may occur on any ITC 2.1 Channel over the MDP, including both CME and NYMEX market data channels.   When this condition is reached, it will precipitate a corresponding change to the MDP header sequence number, as the two are synchronized.