No, you may sell or buy. IRA.s don't have to deal with K1's passive income, dividends, interest, etc. The only thing that can bring this to a halt is democratic poisoning tax status by excessive spending and tax policy. UBTI is listed in box 20 of the k-1. Putting mlp's in an IRA is no hassle; just pay attention to box 20 for all mlp's. Also keep good records of distributions and K1 statements.