The Global Whitelist for the 6v6 competitive format was released on September 8th, 2016 after weeks of discussion between league representatives and top players all over the world in an effort to standardize the competitive format. It was a major milestone because of the large variety of unlocks previously banned since their releases being unbanned except for the overly broken ones.
Over time, the Global Whitelist has undergone iterations and changes based on community feedback. These revisions occur between seasons of the major leagues. 
Since it's concoction, the UGC, ETF2L, ozfortress, and AsiaFortress leagues continue to uphold the use of the whitelist.
September 8, 2016 - Whitelist
- The 6v6 Global Whitelist is adopted by the Team Fortress 2 competitive community.
- Immediately after the initial announcement, a few changes were made due to community complaints. The Atomizer and B.A.S.E. Jumper now are kept banned.
January 14, 2017 -
- Another meeting between league admins and top players is held after most leagues' seasons have ended and tried the first version of the Global Whitelist. It is decided that: 
- For Esports Arena Rewind 2017, the Rescue Ranger, Jarate and Machina will be banned. 
- The PUG system PugChamp will try a new whitelist with the Rescue Ranger and Jarate banned as well as the Soda Popper, Dalokohs Bar, Pomson 6000, Quick Fix and Solemn Vow unbanned. 
January 21, 2017 - Whitelist
- ETF2L makes a post announcing the whitelist for ETF2L 6v6 Season 26.  The decision was taken along with ESEA for S24 and ozfortress for S18.
- It is decided that the Rescue Ranger will remain banned while only Dalokohs Bar and Pomson 6000 will remain unbanned.
January 25, 2017 - Whitelist
May 9, 2017 - Whitelist
- Vaccinator and Jarate get banned.
October 21, 2017 - Whitelist
- Provisional measures were taken by the admin team due to the Jungle Update falling right in between seasons introducing new weapons, changes and bugs: 
- Banned: Backburner, Beggar’s Bazooka, Dragon’s Fury, Gas Passer, Hot Hand, Mantreads, Panic Attack, Pretty Boy’s Pocket Pistol, Second Banana, Thermal Thruster
December 26, 2017 - Whitelist
- A provisional whitelist is published for testing during the long preseason period:
- Banned: Cow Mangler 5000, Natascha
- Unbanned: Backburner, Beggar’s Bazooka, Darwin’s Danger Shield, Gloves of Running Urgently, Hot Hand, Panic Attack, Second Banana, Thermal Thruster, Vita-Saw
- Unbanned for testing: B.A.S.E Jumper, Bonk! Atomic Punch, Gas Passer, Sandman
January 19, 2019 - Whitelist
- Scorch Shot and Detonator get banned.
May 26, 2019 - Whitelist
- Unbanning: Atomized, Dragons fury and Mantreads
- Banning: Diamondback
September 09, 2020 - Whitelist
- Unbanning: Solemn Vow