Adventurers League now uses the 2024 rules. But that does not mean that some 2014 options are gone.
The 2024 Players Handbook contains rules for almost all D&D classes, such as Fighter, Rogue, and Wizard. The Artificer is missing from the 2024 Players Handbook, but we’ll get to the Artificer later.
With the exception of Artificer, all characters should be using the rules for classes from the 2024 Players Handbook.
If you want to play as a Wizard, you must use the 2024 Wizard rules.
The 2024 Players Handbook contains rules for four subclasses from each of the classes. If you want to play as any of those subclasses, you must use the version in the 2024 Players Handbook.
The Wizard schools have been renamed. For example, “School of Evocation” has been renamed to “Evoker”. So, if you want to play as an Evocation Wizard, you must use the Evoker subclass from the 2024 Players Handbook.
The “Path of the Totem Warrior” Barbarian subclass has been renamed to “Path of the Wild Heart”. Using the Path of the Totem Warrior rules is not permitted anymore. You must use the Path of the Wild Heart rules now.
“Race” has been renamed to “Species” in the new 2024 rules.
The 2024 Players Handbook contains rules for many of the common species. If you want to play as any of those species, you must use the version of the 2024 Players Handbook.
For example, if you want to play as a Human, you must play as a 2024 Human. You cannot use the 2014 Human anymore. This also means Variant Human is unavailable.
The 2024 Players Handbook contains rules for many backgrounds. Backgrounds now include an Origin Feat.
If you want to use the Sage background, you must use the version contained in the 2024 Players Handbook.
Adventurers League has an overall rule whereby you always use the latest printing of any rule.
For example, Goliath was printed in all of the following books: