It is called a public service message, I believe.
Public announcement
The noun proclamation is a noun form of the verb to proclaim.The noun 'proclamation' is an concrete noun as a word for a written or spoken public or official announcement.The noun 'proclamation' is an abstract noun as a word for the idea(s) contained in such an announcement; a word for a concept.
This means to officially publish the informal rules.
Official approval is sanction.
Sentence: It is not unusual for the President to issue an annual Thanksgiving proclamation.It is an official announcement.
Proclomation
declaration
Public Announcement was created in 1990.
This annual announcement or speech is called "The state of the union address,"
A Public Disservice Announcement was created in 2009-03.
public service announcement by jay-z
Public Service Announcement
There has not been any official announcement from Apple as to what a new iPhone will be called in 2015.
an incumbent
The sixth book is going to be called "Fang". Check out this link to see an official announcement from James Patterson; http://www.max-dan-wiz.com/video/official-max-6-announcement
Public announcement
speech