A railroad need not report:
(a)
Casualties which occur at highway-rail grade crossings that do not involve the presence or operation of on-track equipment, or the presence of railroad employees then engaged in the operation of a railroad;
(b)
Casualties in or about living quarters not arising from the operation of a railroad;
(c)
Suicides as determined by a coroner or other public authority; or
[39 FR 43224, Dec. 11, 1974, as amended at 61 FR 30973, June 18, 1996]