Rules For Mexican Mail.

New York Times 100 years ago today, May 20, 1913:
Burleson Warns Postmasters to Honor Only Huerta Money Orders.
    WASHINGTON, May 19.— An order was issued by Postmaster General Burleson to-day directing that Postmasters refuse to pay money orders issued on and after May 25 at any Post Office in Mexico unless they should have received the corresponding advices previously indorsed by the Huerta Postal Administration with a special stamp, reading: "Visador por la Direccion General de Correos de Mexico, D. F." When payment is thus refused, the instructions say, the holder of the order should be advised to return it to the sender. The order is in accordance with an agreement entered into between the American and Mexican Postal Departments.
    At present all mail for any part of Mexico under the control of the Huerta Government moves by maritime routes down to Vera Cruz, and thence to Mexico City by rail, and is there distributed by the Mexican postal authorities. Mail for the Northern States of Mexico, where the Constitutionalists are in control, is delivered, according to the regular practice of the department, to the postal authorities who are de facto in control, in spite of the protest of the Huerta Administration, which has given notice that it will not be responsible for mail delivered to any one but its own postal authorities.