The built-in checklists for ABA area states and provinces are created from two sources, merged together:
For each entry in the grandfather list, I checked the state's official
checklist (*) to be sure that the species is actually on the list.
I removed species that I did not
(*) For a few states or provinces, I could not find a list that was published by a records committee, so I had to use an unofficial list.
For species that were on a state's eBird list but not on the state's official list, I used my judgement to exclude presumed exotics.
The resulting checklists are more inclusive than you would get from a state records committee, but that isn't necessarily a bad thing. Some states or provinces do not even have an official list published on the internet, and many states have a list that has not been updated in years. I do not have the time or inclination to search for information on records committee decisions more recent than the last published checklist. With a more inclusive list though, it is easy enough to remove any species that you object to by editing the state checklist status. With a records committee list that is outdated, it would be a lot of work to do the research to find out what needs to be added.