Section 5. Militia call by the United States

When the militia of the state
  is  called  forth  under the constitution and laws of the United States,
  the governor shall order out for service the organized militia  or  such
  part  thereof  as  may  be  necessary,  and  if  the number available be
  insufficient, the governor may call for and accept from the  unorganized
  militia  as many volunteers as are required for service in the organized
  militia or he may direct the members of the unorganized militia or  such
  of them as may be necessary to be drafted into the organized militia.