When by reason of disqualification the number of judges competent to sit in a case is reduced to eight or to six and there is equal division among them on any question material to the determination of the case, the fact shall be certified by the Chief Justice or, when he is disqualified, by the judges sitting to the Governor, who shall thereupon appoint a member of the bar of the Supreme Court to sit as a judge of said court in the determination of said case. Similarly, when by reason of disqualification no one of the judges is competent to sit in a case or the number is reduced below six, the fact shall be certified by the Chief Justice, if he is competent to sit, or, if not, by the judge or judges sitting, or, if no one is competent, by the clerk of the court to the Governor, who shall thereupon appoint members of the bar of the Supreme Court to constitute a special court of seven members for the consideration and determination of such case.

The word “disqualification,” as used in this section, shall include inability to sit by reason of prolonged illness of a chronic nature.