The filing system was arranged by the department (or official) of the Northern Rhodesian (Zambian) Government to which the matters covered in a given file related. Excepting that sections 'D' (Development Secretary and predecessors) and 'E' (Economic Secretary) have been combined, this arrangement is generally maintained in this section of the catalogue. Occasional unclassified files, some of which pre-date the Liaison Office, have been incorporated into the relevant divisions of this section. Liaison files relating to the Unofficials' Association will be found in that section; those relating to closer association (C0524, etc.) will be found between MSS. Welensky Papers 64/7-91/1. Others removed to Salisbury (Harare) will be found in their later Federal guise - see, in particular, MSS. Welensky Papers 343/1-360/2. Extracts from Executive Council minutes relating to particular topics and decisions reached are to be found throughout these files and have not been noted separately.

Much of the material formerly filed under this Division relates either to the federation negotiations and other constitutional matters (and will be found at MSS. Welensky Papers 65-90) or to matters that retained Welensky's interest and involvement in the Federal era and came to be incorporated in Federal filing schemes.

The Commissioner office was, in effect, that of a trade commissioner and immigration bureau. There is further material in the 'Closer Association' and 'London visits' files. MSS. Welensky Papers 61/9-62/2 are artificial creations from Liaison files E1523 and UA4504 and Broken Hill file PC143/52. See also MSS. Welensky Papers 679/6 for 'personal' correspondence with Wallace (1951-1962), which overlaps with these files.