TEXT: TASHA’S CAULDRON OF 
  EVERYTHING 
  The following guidance applies to players and DMs using 
  Tasha’s Cauldron of Everything in D&D Adventurers 
  League play. 
  CHAPTER 1. CHARACTER OPTIONS 
  CUSTOMIZING YOUR ORIGIN  
  All characters created for Adventurers League play use 
  these rules instead of the normal rules for Ability Score 
  Increases afforded by virtue of your character’s race.  
   
  Proficiencies  
  Proficiencies can be replaced for other proficiencies as 
  detailed in the table; DMs don’t have the discretion to 
  allow additional options.  
   
  Custom Lineage  
  These rules aren’t used in Adventurers League play.  
  CHANGING A SKILL  
  You can replace one of your character’s skill proficiencies 
  with another skill proficiency at 5th level, 11th level, 16th 
  level, and 20th level. This isn't subject to PH+1.  
  CHANGING YOUR SUBCLASS  
  You can replace one of your character’s subclasses with 
  another subclass at 5th level, 11th level, 16th level, and 
  20th level. This isn't subject to PH+1.  
   
  Training Time  
  You must spend a number of downtime days equal to 
  twice your character’s level and 100 gp equal to your 
  current level. The gold cost is waived if you return to a 
  subclass that you previously held.  
  ALL CLASSES  
  The Optional Class Features provided for classes found in 
  the PH are available for use, but are subject to PH+1, as 
  normal.   
  ARTIFICER  
  The artificer is available for play in Adventurers League: 
  Forgotten Realms.   
   
  Spellcasting  
  Artificers can prepare any spell found on their spell list—
  including those found in Xanathar’s Guide to Everything—
  in conjunction with the Artificer Spellcasting class feature. 
  Spells prepared in conjunction with the Spellcasting class 
  feature for any other class are subject to PH+1, as normal.  
   
  Artificer Infusions  
  Repeating Shot. The property of this infusion that creates 
  magical ammunition functions only for ranged weapons 
  with the ammunition property that are otherwise 
  normally available for purchase without campaign 
  documentation.  
   
  BARD  
  College of Creation  
  Performance of Creation. This class feature can only 
  create items that are otherwise normally available for 
  purchase without campaign documentation.  
   
  Feats  
  These feats are available for use. They are subject to PH+1, 
  as normal.  
  CHAPTER 2. GROUP PATRONS  
  The rules found here aren’t used unless the DM is 
  specifically instructed to do so by the adventure.  
   
  CHAPTER 3. MAGICAL MISCELLANY  
  SPELLS  
  These spells are available for use. They are subject to 
  PH+1, as normal.  
   
  CHAPTER 4. DUNGEON MASTER’S TOOLS  
  Dungeon Masters can use these rules except as noted, 
  below.  
  SIDEKICKS  
  The rules found here aren’t used unless the DM is 
  specifically instructed to do so by the adventure.  
  ENVIRONMENTAL HAZARDS  
  The rules found here aren’t used unless the DM is 
  specifically instructed to do so by the adventure. 
  
SOURCE: textdata/thevault/Dungeons & Dragons [multi]/5th Edition (5e)/Adventure League/dnd_tcoe_alguidance.pdf