This proposed law would reduce the state personal income tax rate to 2.65% for all categories of taxable income for the tax year beginning on or after January 1, 2009, and would eliminate the tax for all tax years beginning on or after January 1, 2010. The personal income tax applies to income received or gain realized by individuals and married couples, by estates of deceased persons, by certain trustees and other fiduciaries, by persons who are partners in and receive income from partnerships, by corporate trusts, and by persons who receive income as shareholders of "S corporations" as defined under federal tax law. The proposed law would not affect the tax due on income or gain realized in a tax year beginning before January 1, 2009. The proposed law states that if any of its parts were declared invalid, the other parts would stay in effect.