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1. You don't HAVE to enforce it. No club has to accept the OB regulations although I think they are wise to do so in general.
2. x QJ10xxxxxxx x x is undoubtedly 8 clearcut tricks but no-one would suggest this had "the values" normally associated with a one level opening. Although an extreme example you dfo'nt want this hand being described as strong, Benjamin or any other phrase that will put people off wading in over it.
3. I think most people would open a shapely (5-5+) 10 count so would allow any hand that met that criterion as well as the 8 clearcut tricks
Some deprecate the lack of a precise point count but even when a regulation is precisely framed e.g. clear cut tricks this still leads to vigorous debate about exactly what it means when, irrespective of whether one agrees or not, it is, to my mind, completely clear.