This excerpt taken from the UNH 10-K filed Feb 11, 2009.
15.4 Administrator For Purposes Of Internal Revenue Code
For the purposes of Section 468B of the Internal Revenue Code of 1986, and Treas. Reg. Section 1.468B, the administrator shall be the Claims Administrator. The Claims Administrator timely and properly shall file all informational and other tax returns necessary or advisable with respect to the Settlement Account (including, without limitation, the return described in Treas. Reg. Section 1.468B-2(a)). Such returns (as well as the election described in Section 15.2, shall be consistent with this Section and in all events shall reflect that all taxes (including any estimated taxes, interest, or penalties) on the income earned by the Cash Settlement Fund shall be paid out of the Cash Settlement Fund as provided in Section 15.5.