Related Rule
United Kingdom of Great Britain and Northern Ireland
Practice Relating to Rule 116. Accounting for the Dead
Section B. Recording of the location of graves
The UK Military Manual (1958) provides: “As soon as possible, and at latest at the end of the hostilities, these services must exchange lists showing the location and marking of the graves and giving particulars of the dead interred therein.” 
United Kingdom, The Law of War on Land being Part III of the Manual of Military Law, The War Office, HMSO, 1958, § 383.