I was recently offered and accepted a Sep class date - very excited about that, BTW. My current 1st class medical expires right before the class starts. Do I need to show up on day one with a new 1st class medical or am I good with the one I have now which will have lapsed into a 2nd class? A related question is does the company require FOs to get a first class every 6 months or can you just get one once a year?

Thanks