General Order 128
 Section IV
 Requirements for Communication Systems
  
      
42.8    Location
     
       
Manhole locations shall be such that the opening will provide 
 safe access and, where practicable, shall be so located that future maintenance 
 work will cause minimum interference with the normal flow of vehicular traffic.
     
   In no case may the nearest edge of the opening at the surface be less 
than  3 feet from any rail of any railroad or streetcar track.  (Also see Rule 41.5-C, Appendix B, Fig. 9, and Appendix C, Fig.
2.) .
     
   This rule does not apply where satisfactory proof is submitted to the
Commission  that it is impracticable or physically impossible to comply with
this rule  within the space or location so designated by proper authorities.