810.74/611: Telegram
The Secretary of State to the Ambassador in the United Kingdom (Winant)
5738. Your 6368, November 12, 9 p.m. Our Embassy in Buenos Aires informs us that the Argentine decree regarding telecommunications [Page 173] of October 88 will prohibit the use of code or cipher by radio for messages outside of the continent. This will apply also to all diplomatic missions. It was further asserted that code and cipher messages would be permitted by cable.
In view of foregoing, the only authorized channels of rapid secret communication between the Axis missions in Santiago and Buenos Aires and their Governments will be via cables controlled by London, and it is assumed that the British authorities will take the necessary steps to prevent such communication.