The Official Gazette of the Federation (Spanish: Diario Oficial de la Federación; also known as the Official Journal of the Federation, Official Diary of the Federation, and DOF), published daily by the government of Mexico, is the main official government publication in Mexico. It is the oldest official journal on the American continent.
Current issues express legally the political, economic and social institutions in Mexico, while the history of those same institutions can be read in older issues.
The Official Gazette is similar to other main governmental journals (as the United States Federal Register or the Canada Gazette), but they differ from each other because they respond primarily to their type of government and secondly to their legal system.
In the Official Gazette, the main rules and regulations of the three branches of the federal government are published. This journal is the head of the set of the governmental journals in Mexico (every state and the Federal District has an official gazette for its jurisdiction, and also some municipalities).
The importance of reading the Official Gazette on a daily basis responds to the mandate that all official government rules and regulations must be published in it, and so only through this publication their compliance can become mandatory. Once a law or regulation is published, ignorance of it is no longer a legal defence.
The Official Gazette contains treaties, laws, decrees, sentences, agreements, resolutions, general and judicial warnings, national and international public bids to provide the government with goods and services, among other issues concerning the three Branches of the Federation.
This journal is regulated by the Law of the Official Journal of the Federation and Government Gazettes (DOF, December 24, 1986). The responsibility for its compilation is within the Secretariat of the Interior (Secretary of Government), officially known as Secretaría de Gobernación, or SEGOB.