; but (bb) the vote on passage shall— (AA) require the affirmative vote of two-thirds of Senators, duly chosen and sworn, for passage; and (BB) be on the joint resolution of the other House. (ii) Treatment of joint resolution of other house If one House fails to introduce or consider a joint resolution under this section, the joint resolution of the other House shall be entitled to expedited floor procedures under this paragraph. (iii) Treatment of companion measures If, following passage of the joint resolution in the Senate, the Senate then receives an identical resolution from the House of Representatives, the resolution of the House shall not be debatable. (iv) Consideration of veto messages If the President vetoes a joint resolution of approval, debate on a veto message in the Senate shall be 1 hour equally divided between the majority and minority leaders or their designees. (F) Rules of House of Representatives and Senate This paragraph enacted by the Senate and the House of Representatives— (i) as an exercise of the rulemaking power of the Senate and House, respectively, and as such it is deemed a part of the rules of each House, respectively, but applicable only with respect to the procedure to be followed in that House in the case of a joint resolution of approval, and it supersedes other rules only to the extent that it is inconsistent with such rules; and (ii) with full recognition of the constitutional right of either House to change the rules (so far as relating to the procedure of that House) at any time, in the same manner, and to the same extent as in the case of any other rule of that House. (5) Definitions In this subsection: (A) Explosive nuclear testing The term explosive nuclear testing — (i) means testing involving the explosive compression or assembly of fissile material to exceed critical mass with the attendant release of any nuclear energy from fission processes