I think in most cases the designated source for contest scoring is the
WorldWide Soaring Turnpoint Exchange data. John Liebacher and I
collaborate on airspace, so his data and mine are virtually identical,
with the following exceptions:

- John restates the ceilings above airspace that is closed to
contests in accordance with the contest rules, where my data shows the
actual airspace ceiling as per the FAA sources
- John updates the airspace as required, often a few weeks before the
contest. I update the airspace every 56-day charting cycle.
- I include airspace (such as Alerts and MOAs) that could be of
interest, but is (unless otherwise designated) open to contest pilots

Lynn