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What EPW header parameters does EnergyPlus use?

I am working on a python package to use NOAA weather data to create AMY epw files for arbitrary locations in order to compare EnergyPlus models to historical performance.

I have the main body of the data ready to go with all 34 columns and 8760 hours for a given year. I'm looking to round out the project by calculating the header information in the first 8 lines of the header.

1) Could I go ahead and use these files with the first 8 lines blank to simulate with EnergyPlus? If not, what parameters do I need to make sure I have in the header? Would a placeholder work without altering the simulation?

2) Is there a programmatic way to determine design conditions? Do they vary by region?