As of August 24, mGBA 0.9.2 is the approved emulator. Version 0.9.1 will be accepted until Saturday, September 25, 2021 at 00:00 UTC.
Additionally, mGBA soon will be implementing an automatic updater. This will simplify the program update process. Therefore, we will change the rules on Sept 25 so that the latest version of mGBA is the legal version, with a 30 day grace period from when it is officially released.
In addition, the rules have been cleaned up overall, so please be sure you are familiar with them.
(Updated August 24, 2021)