[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR236.18]

[Page 641]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 236_RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, 
 
              Subpart A_Rules and Instructions: All Systems
 
Sec.  236.18  Software management control plan.

    (a) Within 6 months of June 6, 2005, each railroad shall develop and 
adopt a software management control plan for its signal and train 
control systems. A railroad commencing operations after June 6, 2005, 
shall adopt a software management control plan for its signal and train 
control systems prior to commencing operations.
    (b) Within 30 months of the completion of the software management 
control plan, each railroad shall have fully implemented such plan.
    (c) For purposes of this section, ``software management control 
plan'' means a plan designed to ensure that the proper and intended 
software version for each specific site and location is documented 
(mapped) and maintained through the life-cycle of the system. The plan 
must further describe how the proper software configuration is to be 
identified and confirmed in the event of replacement, modification, or 
disarrangement of any part of the system.

[70 FR 11095, Mar. 7, 2005]

                     Roadway Signals and Cab Signals