According to Ken it's all group dividers.

Check here
or here

EDIT: Regarding the sorting order: Keep it in a way that is comprehensible and makes sense. From your screenshot I'd say left column first group first, then right column first group, then left column second group, etc..
Depending on how far this overlaps it might make more sense to go strictly by column though.

Couldn't read the other post, since it's the rules comitte
So group dividers for all? And what direction should the credits be done, all left down then all right down, or left to right, left to right all the way down?

Quoting Silence_of_Lambs:

Quote:

Depending on how far this overlaps it might make more sense to go strictly by column though.

Some columns are "longer" on the left and it overlaps with the right. Another example:

Yeah, he used these types of credits in Any Given Sunday... which was a complete and royal pain in the ass... 

I believe, after I posed the question here (you can find that specific thread here, and if you ignore the bickering that shockingly took place in a thread on these boards...  , there's some pretty helpful opinions and suggestions) that I ended up doing that cast list as the full left hand column, followed by the full right hand column.

That case is slightly different though, as there wasn't any "main" group dividers in use, just group dividers that happened to appear in the credits. I feel like the same principles apply though. Order the cast in the most logical sense as they appear in the actual credit roll. If that happens to be the entire left hand column first, followed by the entire right hand column, or if it's the first section of the left hand column followed by the first section of the right hand column, I don't feel it's of that much particular importance. The information is still completely and technically correct, and it's all there. In a case like this, I feel like it depends on how the groups are listed in the credits.

Don't know if any of that helps, but there it is!

Quoting Blair:

Quote:
With no real-world text-based DVD credit listing examples at my disposal, as Silence_of_Lambs suggested, I would list the left column first and then the right for the currently visible columns ("The Kovic Family" then "Vitenam") based solely on the methods that other listing systems use. They would not be visible at the very top of the credits if they were meant to be read much later on (after finishing the first column).

Using that same reasoning, when you get past columns that are perfectly parallel, my personal take on a situation is to list in order of group appearance. Like this:

If I saw this grouping (without the numbered headings), my inclination would be to do the left column first and then the right column.

I guess I'm just a rebel! 

I actually like Blair's method and thinking on this.  I vote for that.

This is how I did the groups in the version in the Oliver Stone Collection

The Kovic Family                     
Massapequa
Vietnam
Veterans Hospital
Syracuse                                 
Arthur's Bar
Villa Dulce
Georgia
Miami
Democratic Convention

If you look at US locale UPC 025192-091421, this is how I did it and got approved after a very similar discussion.



Charlie