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Its a championship held in Bahrain. The text I am working on deals with endurance racing, however, when I googled the term, it appears that there are other sports associated with this championship as well. I looked through a list of Bahraini endurance championships and the only championships that included the word "national" were National Day Championship and National Guard Championship... I can't see how either of these could fit the Arabic term, so I suppose it must be something different. I've tried guessing and searching for National Pact and National Charter, but no luck with those either.