Amends Internal Revenue Code provisions relating to the tax deduction for donations of fractional interests in tangible personal property to: (1) permit donors to claim an increased deduction based upon the market value of subsequent gifts of fractional interests; (2) extend to 20 years the period in which donors of fractional interests must contribute their entire interest in donated property; and (3) require donors of fractional interests greater than $1 million to attach a statement of value obtained from the Internal Revenue Service (IRS) to their tax returns.