As to the original point of this thread...
The wording of the rule originally cited is just another example (IMO) of ASA's fractured syntax. This happens when a fairly complicated document gets partial revision every year by committee vote and has only rarely been comprehensively re-edited.
Even though it reads funny, I don't ultimately see any contradiction (taking the rule as a whole, including the exception) or any confusion as to meaning.
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Tom
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