https://github.com/eggert/tz/graphs/contributors
https://en.wikipedia.org/wiki/Tz_database
https://lwn.net/Articles/870478/
They discuss it, try to come to a compromise, and if all else fails, fork it.
Maybe it's not ideal, but then again, people seem to have a big problem when you have 'boards' running these projects too, so...
https://github.com/eggert/tz/graphs/contributors
https://en.wikipedia.org/wiki/Tz_database