Mindful -
Some (but not a complete list) of the things that are required, as I understand and have participated in here in Atlanta:
-a meeting must say/clarify that it is for the recovery from alcoholism only (it used to say "and drugs")
- it reads/displays (see the banner thing, as I learned what those are from my fiance who has less sober time than me!) or paraphrases (as my home group does, saying "we do not read the steps, traditions or promises but we do practice them")
-has group conscience meetings as necessary when members vote for one, or at regular intervals (some of the bigger clubhouses have them once a month, for example)
- states that there are no dues or fees for AA membership; the only requirement for membership is a desire to stop drinking
Here is the full info on guidelines for membership and listing in the AA directory as an acknowledged meeting -
https://www.aa.org/pages/en_US/aa-guidelines
I believe the Agnostica link you found is -
How to Start an AA Meeting | AA Agnostica - interestingly this source labels itself as "a space for atheists, agnostics and freethinkers worldwide." I am not familiar with its intricacies.
These posts do help me learn!