Article 16 Vienna Convention on Consular Relations
Precedence as between heads of consular posts
1.Heads of consular posts shall rank in each class according to the date of the grant of the exequatur.
2.If, however, the head of a consular post before obtaining the exequatur is admitted to the exercise of his functions provisionally, his precedence shall be determined according to the date of the provisional admission; this precedence shall be maintained after the granting of the exequatur.
3.The order of precedence as between two or more heads of consular posts who obtained the exequatur or provisional admission on the same date shall be determined according to the dates on which their commissions or similar instruments or the notifications referred to in paragraph 3 of article 11 were presented to the receiving State.
4.Acting heads of posts shall rank after all heads of consular posts and, as between themselves, they shall rank according to the dates on which they assumed their functions as acting heads of posts as indicated in the notifications given under paragraph 2 of article 15.
5.Honorary consular officers who are heads of consular posts shall rank in each class after career heads of consular posts, in the order and according to the rules laid down in the foregoing paragraphs.
6.Heads of consular posts shall have precedence over consular officers not having that status.
See also: Article 15 Vienna Convention on Consular Relations