Article 7 Exercise of consular functions in a third State The sending State may, after notifying the States concerned, entrust a consular post established in a particular State with the exercise of consular functions in another State, unless there is express objection by one of the States concerned. Article 8 Exercise of consular functions on behalf of a third State Upon appropriate notification to the receiving State, a consular post of the sending State may, unless the receiving State objects, exercise consular functions in the receiving State on behalf of a third State. Article 9 Classes of heads of consular posts 1. Heads of consular posts are divided into four classes, namely (a) consuls-general; (b) consuls; (c) vice-consuls; (d) consular agents. 2. Paragraph 1 of this article in no way restricts the right of any of the Contracting Parties to fix the designation of consular officers other than the heads of consular posts. Article 10 Appointment and admission of heads of consular posts 1. Heads of consular posts are appointed by the sending State and are admitted to the exercise of their functions by the receiving State. 2. Subject to the provisions of the present Convention, the formalities for the appointment and for the admission of the head of a consular post are determined by the laws, regulations and usages of the sending State and of the receiving State respectively. Article 11 The consular commission or notification of appointment 1. The head of a consular post shall be provided by the sending State with a document, in the form of a commission or similar instrument, made out for each appointment, certifying his capacity and 6