All of the powers granted the Governor by this chapter with respect to a state of war emergency shall terminate when:
(a) The state of war emergency has been terminated by proclamation of the Governor or by concurrent resolution of the Legislature declaring it at an end; or
(b) The Governor has not within 30 days after the beginning of such state of war emergency issued a call for a special session of the Legislature for the purpose of legislating on subjects relating to such state of war emergency, except when the Legislature is already convened with power to legislate on such subjects.