Rebecca Eschliman <firstname.lastname@example.org> asks:
> Is that supposed to serve some practical purpose for the union
Yes. For instance, you're a star, and you say, "I want my name
to appear before the title." So the next star says "Well, then I want
mine right after the title." Editors' credits have to go in a specific
place in relation to the title. And so on. It's to help avoid
problems of dumping people's credits where they won't be seen.