225.15—Accidents/incidents not to be reported.
         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;
    
    
    
    
    [39 FR 43224, Dec. 11, 1974, as amended at 61 FR 30973, June 18, 1996]