Some states, like Colorado and Utah, honor a negative Coggins Test for up to 12 months. Other states, like Montana and Nevada, only honor the test for up to 6 months. Either way, if you’re traveling with a horse, the Coggins Test isn’t the big time crunch. Many states only honor the Certificate of Veterinarian Inspection for up to 30 days. In other words, you have 30 days after the certificate is issued to travel with the horse and get where you’re going. In some states, it’s as long as 6 months. In other states, it’s as little as 10 days. Some states will specifically honor the digital passport, GoPass, for up to 6 months.