Section 18.(A)  Declaration and Counter-Declaration.  When a majority of the statewide elected officials determine that any other such official is unable to discharge the powers and duties of his office, they shall transmit a written declaration to this effect to the presiding officer of each house and to the official, and shall file a copy of the declaration in the office of the secretary of state.  Thereafter, the constitutional successor shall assume the office as acting official unless, within forty-eight hours after the declaration is filed in the office of the secretary of state, the elected official files in that office and transmits to the presiding officer of each house his written counter-declaration of his ability to exercise the powers and perform the duties of his office.  

(B)  Determination by the Legislature.  The legislature shall convene at noon on the third calendar day after the filing of any counter-declaration, which may be filed by the official at any time.  Should two-thirds of the elected members of each house fail to adopt a resolution within seventy-two hours declaring probable justification for the determination that inability exists, the official shall continue in or resume office.  

(C)  Assumption of Office by Constitutional Successor.  If two-thirds of the elected members of each house adopt a resolution declaring that probable justification exists for the declaration of inability, the constitutional successor shall assume the powers and duties of the office and a copy of the resolution shall be transmitted forthwith to the supreme court.  

(D)  Determination by Supreme Court.  By preference and with priority over all other matters, the supreme court shall determine the issue of inability after due notice and hearing, by a majority vote of members elected to the court, under such rules as it may adopt.  

(E)  Reconsideration by Supreme Court.  A judgment of the supreme court affirming inability may be reconsidered by the court, after due notice and hearing, either upon its own motion or upon the application of the official.  Upon proper showing and by majority vote of its elected members, the court may determine that no inability then exists, whereupon the official shall immediately resume the powers and duties of his office.