International Civil Aviation Organization. . 9. Effective date The amendments made by this Act shall take effect on the date of the enactment of this Act, except the carbon fee under section 9902 of the Internal Revenue Code of 1986 shall apply to uses, sales, or transfers more than 270 days after the date of the enactment of this Act. 10. Principle of interpretation In the case of ambiguity, the texts of this statute and its amending texts shall be interpreted so as to allow for the most effective abatement of greenhouse gas emissions. 11. No preemption of State law Nothing in this legislation shall preempt or supersede, or be interpreted to preempt or supersede, any State law or regulation.