Re: Use custom preamble from tex file for latex export

[Fraga, Eric]

I'm travelling so will keep this short.

A few things potentially wrong with your setup:

1. the elisp src block won't be executed automatically.

2. I do not know if the BIND statements are interpreted when included
   but I imagine they are.
   
Sometimes it's better to use the base Emacs features (e.g. file local
variables) than try to shoehorn everything into org.

-- 
: Eric S Fraga, with org release_9.6.1-224-g8ae8a8 in Emacs 30.0.50