Should any member of the Board of Regents of the University System of Georgia or any member of the State Board of Education be engaged, at the time of any meeting of the board, as counsel or party in any case pending in the courts of this state and should the case be called for trial during the regular session of the board, the absence of the member to attend the session shall be good ground for a postponement or continuance of the case until the session of the board has come to an end.