(1) If the veteran or combat veteran is deceased, or is listed as missing in action, the beneficiary shall be entitled to receive a bonus and may make application to the adjutant general of this state for the respective service bonus the deceased veteran or combat veteran would have been entitled to under this act.

  (2) If a veteran is deceased from service-connected causes after payment of a bonus under this act, the beneficiary shall be entitled to receive the difference between the amount which had been received by the veteran and the sum of $450.00.