Subpart C—Electronic Devices<br /><br />http://www.ecfr.gov/cgi-bin/text-idx?SID=0fe580fb21947c1a29b2da2c3f82088e&amp;mc=true&amp;node=pt49.4.220&amp;rgn=div5#sp49.4.220.c<br /><br />§220.305&nbsp;  Use of personal electronic devices.<br /><br />A railroad operating employee must have each personal electronic device turned off with any earpiece removed from the ear—<br /><br />(a) When on a moving train;<br /><br />(b) When any member of the crew is—<br /><br />(1) On the ground, or<br /><br />(2) Riding rolling equipment during a switching operation; or<br /><br />(c) When any railroad employee is assisting in preparation of the train for movement.