301-10.162—When may I use other than coach-class train accommodations?
         You may use other than coach-class train accommodations only when your agency specifically authorizes/approves this use under paragraphs (a) through (e) of this section.
    
    
        
        (a) 
         No coach-class accommodations are reasonably available on a train that is scheduled to leave within 24 hours of your proposed departure time, or scheduled to arrive within 24 hours of your proposed arrival time;
    
    
        
        (b) 
         When use of other than coach-class accommendations is necessary to accommodate a medical disability or other special need.
    
    
        
        (1) 
         A disability must be certified annually in a written statement by a competent medical authority. However, if the disability is a lifelong condition, then a one-time certification statement is required. Certification statements must include at a minimum:
    
    
        
        (i) 
         A written statement by a competent medical authority stating that special accommodation is necessary;
    
    
    
        
        (iii) 
         A recommendation as to the suitable class of transportation accommodations based on the disability.
    
    
        
        (2) 
         A special need must be certified annually in writing according to your agency's procedures. However, if the special need is a lifelong condition, then a one-time certification statement is required;
    
    
        
        (3) 
         If you are authorized under  § 301-13.3(a) of this Subchapter to have an attendant accompany you, your agency may also authorize the attendant to use other than coach-class accommodations if you require the attendant's services en route;
    
    
        
        (c) 
         When exceptional security circumstances require other than coach-class rail accommodations. Exceptional security circumstances are determined by your agency and should only be authorized to the minimum other than coach-class accommodation necessary to meet the agency's mission. These circumstances include, but are not limited to:
    
    
    
        
        (2) 
         You are an agent on protective detail and you are accompanying an individual authorized to use other than coach-class accommodations; or
    
    
    
        
        (d) 
         Coach-class accommodations on an authorized/approved foreign rail carrier do not provide adequate sanitation or health standards; or
    
    
        
        (e) 
         When required because of agency mission, consistent with your agency's internal procedures pursuant to  § 301-70.102(i).