The Madrid System for the International Registration of Marks is governed by two treaties: the Madrid Agreement Concerning the International Registration of Marks, which dates from 1891, and the Protocol Relating to the Madrid Agreement, which was adopted in 1989, entered into force on December 1, 1995, and came into operation on April 1, 1996. Common Regulations under the Agreement and Protocol also came into force on that date. The Madrid System is administered by the International Bureau of the World Intellectual Property Organization (WIPO), which maintains the International Register and publishes the WIPO Gazette of International Marks.