Article 17 Vienna Convention on Consular Relations

Performance of diplomatic acts by consular officers

1.In a State where the sending State has no diplomatic mission and is not represented by a diplomatic mission of a third State, a consular officer may, with the consent of the receiving State, and without affecting his consular status, be authorized to perform diplomatic acts. The performance of such acts by a consular officer shall not confer upon him any right to claim diplomatic privileges and immunities.

2.A consular officer may, after notification addressed to the receiving State, act as representative of the sending State to any intergovernmental organization. When so acting, he shall be entitled to enjoy any privileges and immunities accorded to such a representative by customary international law or by international agreements; however, in respect of the performance by him of any consular function, he shall not be entitled to any greater immunity from jurisdiction than that to which a consular officer is
entitled under the present Convention.

See also: Article 16 Vienna Convention on Consular Relations