My understanding is that UBIT is due to leveraging done by MLPs which means that a portion of their income relates to debt as a percentage of income and is considered UBIT. Since you are not allowed to borrow within an IRA any income related to borrowing is taxed as UBIT.
An MLP with no debt would have no UBIT to report on line 20V of the K-1.
But some tax preparers have indicated recaptured depreciation creates UBIT at the investor level for a MLP with no UBIT. I would llke to know if this is correct.
I would especially like to know where, in the tax laws, it says recaptured depreciation creates UBIT within an IRA when the MLP has none.