| http://www.w3.org/ns/prov#value | - 'Provided, That no operator, train despatcher, or other employee who, by the use of the telegraph or telephone, despatches, reports, transmits, receives, or delivers orders pertaining to or affecting train movements, shall be required or permitted to be or remain on duty for a longer period than nine hours in any twenty-four-hour period in all towers, offices, places, and stations continuously ope
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