Section 163. Time of transmission

Every agent authorized to act as such by
  any steamship company, express company, or otherwise for the purpose  of
  transmitting money, shall within two days after receipt thereof, deliver
  to  his  principal  the money so received. Every such steamship company,
  express company, or other company shall thereupon and within three  days
  after  receipt thereof from an agent, transmit the same to the person to
  whom such money has been consigned by the transmitter unless within such
  period of three days there be no mail bearing steamer  leaving  for  the
  point  of destination of such moneys, in which event such money shall be
  transmitted on the first steamship to leave thereafter.