Tomorrow I have a final interview for an APEC card (US). After meeting with US Customs today it seems likely to be approved. My understanding is once I have it I can enter Thailand for 90 days. Is it possible to do a 30 day extension or convert to another Visa on it? It isn't an issue for now - I will not be staying longer than 45 days. But I am thinking ahead for when I turn 50 and may wish to convert to a one year. Anything else I should know about it?