This article's lead section may be too short to adequately summarize the key points. (September 2023) |
In the context of the enlargement of NATO, Article 10 of the North Atlantic Treaty is the origin for the April 1999 statement of a "NATO open door policy".[1][2] The open door policy requires a consensus in favour of countries applying to join NATO, as all member states must ratify the protocol enabling a new country to become a member of NATO. The open door policy "is aimed at promoting stability and cooperation".[3]