I find typos all the time when using handbooks during compliance planning or auditing. It is usually situations like those, where the letters are close on the keyboard (d & r) or the incorrect spelling (whether & weather), that slip by them due to spell check limitations.
I have been in auditing for a while and I can't recall ever hearing anything about a detention period relating to auditing, so I think it's a safe bet that this was a typo.
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