The phrase "official publication" refers to a document or material that has been authorized and approved by a particular organization or government to provide accurate and reliable information to the public. Full definition
Protect official publications of law in a digital format through authentication using technological measures, in order to ensure that the content is trustworthy, and make this clear to people. (slaw.ca)
The self - publishing author with an edited manuscript and jacket design can cut that spread radically but should nevertheless have the book ready for sale in ebook or print form the same four weeks before official publication date. (alanrinzler.com)
The Office for Official Publications of the European Communities published a book edited by the Research and Documentation Department of the Court of Justice of the European Communities on «The Jurisdictions of Member States of the European Community — Structure and Organisation». (network-presidents.eu)