"Just renew it" was my thought too. But the guy asking the question is an engineer and wanted to know the source of my information. That got me wondering about what the requirements actually are and I couldn't find anything on the official government sites. We've been going to the BVI's since 1993 but this time we're taking 6 newbies with us. They're asking all sorts of questions I haven't thought about in a long time. It's kind of fun looking at things through fresh eyes.