Hi. If someone has a multiple entry 1 year non B visa, how soon can he apply for an extension? Does he have to wait a month before it expires or is it possible for him to extend it earlier? I'm asking because this person didn't realize that he would have to exit the country every 90 days with this type of visa. Would an extension nullify that, though? I would think that the extension would have the same terms as the original visa. Please correct me if I'm wrong. Thanks!