When the bodily remains of an unknown person are discovered in an unidentified and unmarked grave of a municipally owned and operated cemetery, the remains may be removed to some other gravesite within the cemetery, at the expense of the municipality, if no record exists as to a sale or conveyance of the lot and the municipality is without knowledge that a body had been buried in the gravesite, in the event the lot is sold to another person. An application for approval of the disinterment and removal of the bodily remains shall be first filed with, and approval obtained from, the State Health Department.