It’s all based on your trust level. There are varying degrees of them that allow for certain perks and privileges of posting, and they do degrade over time if you do not continue to meet the metrics of X trust level.
I share this with the caveat that this is not something that our Blues or any staff has certified, but it at least offers a rough guideline on certain levels to try and aim for if you’re wanting to increase your trust level.
Side note: I recall the most widely used post on this was in the green text of an MVP, but I cannot seem to lay hands on it at the moment.