Meet-up Route & Level Restrictions

I’m sure this has been discussed but a search on the forum drew a blank.

So, I’m looking at setting up a meet-up for my club mates in to the jungle. However some of them are lower than the level required for free ride entry.
Will they be able to join the meet-up and stay on the route? I’m sure I saw posts when meet-ups were introduced that stated there was an issue with this.