Secretariat records, as separate from Secretariat Documents issued with official document codes, include programme files, project files, division files, registry files, administrative files, and working files. The Archival Group is comprised of the following collections and fonds:
-Legal instruments (LA) Collection: agreements, conventions, recommendations, final acts, plans of operation, protocols, contracts, statutes, credentials, full powers of the Delegates of the General Conference, etc., that have been transferred to the Archives.
-Central Registry Collection: official correspondence files (also called 'registry files' and 'subject files on programme maters') contianing documents collected from Secretariat units and organized according to a subject-based classification scheme by the former Registry Section.
-Secretariat fonds: records created and maintained by the organizational units of the Secretariat in the course of their activities, such as, for example, the Executive Office of the Director General (CAB), Bureau of Studies and Programming (BEP, PSP), Secretariat of the General Conference and the Executive Board (SCX), etc. The fonds includes records of committees and commissions that reported to the Director-General.