Position of rules definitions

[Paul Eggert]

Liviu Nicoara <nicoara at roguewave.com> writes:

> I noticed that a couple of rules (e.g. EU, Romania) in the Europe file
> are being referenced in zone definitions before they are defined. Is
> there a strong reason why their definitions should not precede their
> usage?

It's listed that way for convenience, which I suppose is not a strong
reason.  Is there some reason to change things, and put definitions
before use?