Article 38 Vienna Convention on Consular Relations

Communication with the authorities of the receiving State

In the exercise of their functions, consular officers may address:

(a) the competent local authorities of their consular district;

(b) the competent central authorities of the receiving State if and to the extent that this is allowed by the laws, regulations and usages of the receiving State or by the relevant international agreements.

See also: Article 37 Vienna Convention on Consular Relations