to rescind all or part of any funding, CBO shall prepare and submit to the appropriate committees of the House of Representatives and the Senate an estimate of the reduction in budget authority which would result from the enactment of the proposed rescissions. 1014. Treatment of rescissions Rescissions proposed by the President under this part shall take effect only upon enactment of the applicable approval bill. If an approval bill is not enacted into law within 30 days from the enactment of the appropriation measure to which the approval bill relates, then the approval bill shall not be eligible for expedited consideration under the provisions of this part. 1015. Definitions As used in this part: (1) Appropriation measure The term appropriation measure means an Act referred to in section 105 of title 1, United States Code, including any general or special appropriation Act, or any Act making supplemental, deficiency, or continuing appropriations, that has been enacted into law pursuant to article I, section 7, of the Constitution of the United States. (2) Approval bill The term approval bill means a bill which only approves rescissions of funding in a special message transmitted by the President under this part and— (A) the title of which is as follows: A bill approving the proposed rescissions transmitted by the President on ___ , the blank space being filled in with the date of transmission of the relevant special message and the public law number to which the message relates