Retirement tax questions

Thank you for the explanation!

So it sounds like I (spouse) will need to take the appropriate RMD for the combined value of MY IRA and HIS IRA, which I can take out of my IRA alone given that I may not have access to his. I COULD get a waiver but since I COULD take the combined RMD out of mine alone, I won't need one. Of course, I'm prepared for situations where SOMEONE might quibble that only half the money I withdrew was RMD and the rest would not be attributable to HIS RMD. Just thinking ahead.

Thank you again!