In classification markings this is abbreviated as FVEY, with the individual countries being abbreviated as AUS, CAN, NZL, GBR, and USA, respectively.

Emerging from an informal agreement related to the 1941 Atlantic Charter, the secret treaty was renewed with the passage of the 1943 BRUSA Agreement, before being officially enacted on 5 March 1946 by the United Kingdom and the United States. In the following years,