The different local leagues and calendars are exactly why different sections handle NTRP calculations differently. For example, ESRs are only necessary if you start a league that has a championship in the next year before that year's ratings come out. So if you have a "fall" adult league in 2011 that feeds into the 2012 nationals, you need an ESR.
Some of the other stuff makes no sense to me, but there is logic behind those decisions...
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