when are time_period precedence rules applied?

[eponymous alias]

I'm trying to figure out the meaning of the "Precedence in Time Periods" section of the Time Periods page of the Nagios 3 doc.  At what point might this order of precedence come into play?  The existing text is not clear about the conditions under which this occurs.  How does this interact with inclusion ("use") / exclusion of time periods?  Can someone provide examples, and provide a pointer to where in the source code the precedence rules are implemented?


      

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