(extension of interim guidance on deductibility under I.R.C. §67 of costs paid to investment advisor by non-grantor trust or estate; extension is until IRS publishes final regulations on the issue (i.e., extension is for tax years beginning before date that final regulations are issued); initially, IRS provided in Notice 2008-32 that taxpayers do not have to determine the part of a bundled fiduciary fee that is subject to the 2 percent floor for any tax year beginning before 1/1/08 and later guidance specified a later cut-off date; regulations are necessary in light of U.S. Supreme Court decision in Knight v. Comr., 552 U.S. 181 (2008)).