Article 2 Vienna Convention on Consular Relations
Establishment of consular relations
1.The establishment of consular relations between States takes place by mutual consent.
2. The consent given to the establishment of diplomatic relations between two States implies, unless otherwise stated, consent to the establishment of consular relations.
3.The severance of diplomatic relations shall not ipso facto involve the severance of consular relations.
See also: Article 1 Vienna Convention on Consular Relations