A summary of the UKUSA DOE in 1979

A recently declassified Canadian document written in 1979 provides a nice summary of the geographic breakdown of the collection and processing "division of effort" among the five UKUSA partners at that time.

"The intelligence tasks of the Canadian SIGINT organization have evolved over the years in cooperation with collaborating SIGINT agencies and in consultation with the Canadian intelligence community. They have included the civil and military activities and organizations in the Soviet Arctic, and the production of intelligence relating to surveillance of Canadian territory and to security. The scope of the SIGINT effort has been broadened by diverting resources to the exploitation of [redacted] and by extending the study of the Soviet economy particularly energy. In general, the SIGINT efforts of the collaborating agencies, while overlapping to some degree, emphasize national interests and reflect collection capabilities. The Australian and New Zealand efforts are directed to China, Japan and South East Asia. The U.K. effort is targetted generally against the Soviet Union, European and East European countries, the Middle East, the Mediterranean, and sub-Saharan Africa. The U.S. effort can be categorized as world-wide in scope and is extensively coordinated within the AUS/CAN/UK/US/NZ community." 

While the broad outlines of the UKUSA DOE have been known to researchers for a long time, I think this is the most detailed official account of the geographic aspects of the DOE that has ever been released. 

The document in question is a six-page SIGINT Program Forecast for fiscal year 1980-81, written by CSE and dated 5 September 1979. It was obtained by the Canadian Foreign Intelligence History Project and is listed in their collection under the name "CSE Doc 79-09-05 - SIGINT Program Forecast 1980-81.pdf"