This SE question describes the process for submitting adventures from conventions to Adventurers League to become certified “legal” CCC-AL adventures.
Adventurers League generally restricts the commonality of treasure in an effort to keep it rare and special. For example, generally Tier 1 adventures will see uncommon magical items.
What are the general guidelines or precedent for how many magical items are appropriate for the length of an adventure and what commonality (i.e. common, uncommon, rare, very rare, legendary) is appropriate for potentially AL “legal” adventures?