Now available: UPDATES 2018 for UNIMARC, 3rd. ed.
International Federation of Library Associations and Institutions (IFLA)
25 Oct 2018
Bibliographic Utilities
All updates to the UNIMARC Bibliographic and Authorities formats, 3rd ed., approved in 2018 are available online (in PDF format).
See all the updates to the UNIMARC Bibliographic format.
See all the updates to the UNIMARC Authorities format.
Full text here.