Thanks for this. I downloaded the form, filled it out, and printed it. We will see if it works when I get there.
I'd at least print it in color and cut it to form size. I noticed on bottom there was a message about not for free print, whatever that means. Functionally, it serves the purpose of declaring what you have or don't have but who knows if officials will accept it? Maybe Mexican law doesn't allow for non-official forms.