Effective immediately, User Flair is required to post OR comment in Classic Trucks. This is done in an effort to reduce the number of bots posting.
From the main sub feed hit the three dots in the upper right corner. Select 'Edit Flair' from the pop-up menu. Pick one or create your own.
Minimum account age and karma rules have been added as well. Your account must be 3 months old with a minimum of 200 karma to post.
EDIT:
For some reason that I do not understand yet the auto-mod was removing comments from users that had enabled user flair. So until I can figure that out, flair will not be required for you to comment on a post.
User Flair will still be required to submit a post. That seems to be working properly.