It is indeed difficult to find info online. I think your best bet is to contact the embassy or local consulate to get definitive information. Ask for them to give you specific citations of the relevant law and regulation(s). Equally good might be to contact an experienced import/export firm. Or, the airline.

This link https://cuencahighlife.com/ecuador-g...wn-in-ecuador/ provides contact info for an Ecuadorian attorney who seems to be knowledgeable that you might contact.