After-Arrival Mandatory Directive [Transportation] Law and Legal Definition

According to 49 CFR 236.1003 [Title 49 – Transportation; Subtitle B -- Other Regulations Relating to 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; Subpart I--Positive Train Control Systems], after-arrival mandatory directive means “an authority to occupy a track which is issued to a train that is not effective and not to be acted upon until after the arrival and passing of a train, or trains, specifically identified in the authority.”