- Title 1 - General Provisions
- Title 2 - Grants and Agreements
- Title 3 - The President
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- Title 16 - Commercial Practices
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- Title 18 - Conservation of Power and Water Resources
- Title 19 - Customs Duties
- Title 20 - Employees' Benefits
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- Title 34 - Education
- Title 35 - Panama Canal
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- Title 37 - Patents, Trademarks, and Copyrights
- Title 38 - Pensions, Bonuses, and Veterans' Relief
- Title 39 - Postal Service
- Title 40 - Protection of Environment
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- Title 42 - Public Health
- Title 43 - Public Lands: Interior
- Title 44 - Emergency Management and Assistance
- Title 45 - Public Welfare
- Title 46 - Shipping
- Title 47 - Telecommunication
- Title 48 - Federal Acquisition Regulations System
- Title 49 - Transportation
- Title 50 - Wildlife and Fisheries
CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (Parts 200–269) > PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES > SUBPART C—Interlocking (§236.301 to §236.387) > 236.378—Time locking.
236.378—Time locking.
Time locking shall be tested when placed in service and thereafter when modified, disarranged, or at least once every two years, whichever shall occur first.
[49 FR 3385, Jan. 26, 1984]