The Chargé in Mexico (Summerlin) to the Secretary of State
[Received June 12—3:12 a.m.]
137. Department’s telegram 74, May 28, 5 p.m. The Foreign Office now proposes the following modification of plan to govern transactions [transit] between zones for all persons except Russians and hostile aliens:
That the Mexican Government will issue the necessary orders to immigration officers on the frontier to demand only of persons residing in the American zone who are unknown to such agents a letter, communication or proof issued by any municipal authority in the United States zone, stating that the bearer has resided in the zone mentioned for more than 1 year prior to his entrance into Mexico provided he is otherwise admissible, the purpose of such requirement being to facilitate transit; and that the American Government will issue like orders with respect to the Mexican zone. Residents of either zone known to the immigration officers of both countries may be admitted without presenting such letter, communication or proof provided they are otherwise admissible.