In the Managing Retirement series, the following paragraph said (sort of -- my clipboard lost the copy!):

If your beneficiary is other than your spouse, there is a limit to the age difference (=< 10 yr).

What if your "beneficiary" is a trust? Is there any limitation or other difference in what you're required to withdraw? Right now I am figuring on the %age, based on my actuarial life expectancy. Should I make other calculations?