[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR236.109]

[Page 496]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
 PART 236--RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND 
APPLIANCES--Table of Contents
 
             Subpart A--Rules and Instructions: All Systems
 
Sec. 236.109  Time releases, timing relays and timing devices.

    Time releases, timing relays and timing devices shall be tested at 
least once every twelve months. The timing shall be maintained at not 
less than 90 percent of the predetermined time interval, which shall be 
shown on the plans or marked on the time release, timing relay, or 
timing device.

[49 FR 3384, Jan. 26, 1984]