Article 57 Vienna Convention on Consular Relations
Special provisions concerning private gainful occupation
1.Career consular officers shall not carry on for personal profit any professional or commercial activity in the receiving State.
2.Privileges and immunities provided in this chapter shall not be accorded:
(a) to consular employees or to members of the service staff who carry on any private gainful occupation in the receiving State;
(b) to members of the family of a person referred to in subparagraph (a) of this paragraph or to members of his private staff;
(c) to members of the family of a member of a consular post who themselves carry on any private gainful occupation in the receiving State.
See also: Article 56 Vienna Convention on Consular Relations