What are the TL3 requirements as of Dec 2019?

[MicroRNA-1507]

Correct. It needs to be 5 distinct moderator-reviewed posts that were justifiably flagged according to this:

@WyomingMyst-1633

• Must not have received more than 5 spam or offensive flags (with unique posts and unique users for each, confirmed by a moderator)
• Must not have been suspended (including forum suspensions or in-game account actions of any Blizzard game)