Additional to this:

The Convention on the Rights and Duties of States is an international treaty signed in Montevideo, Uruguay, on December 26, 1933.

The convention establishes the definition of the State, its rights and obligations.

In Article 1 it establishes four characteristic criteria of a State that have become part of customary international law.

They have been recognized as confirmation in International Law, establishing that a State as a person of International Law must meet the following requirements:

ARTICLE 1

The State as a subject of International Law must meet the following requirements:

I. – Permanent population.

II. —Determined territory.

III. -Government.

IV. —Ability to enter into relations with other States.

Under these guidelines, any entity that meets these criteria can be considered a sovereign state under international law, whether or not it has been recognized by other states.

ARTICLE 3

The political existence of the state is independent of its recognition by other states.

Even before being recognized, the State has the right to defend its integrity and independence.

ARTICLE 7

The recognition of the State may be express or tacit. The latter results from any act that implies the intention to recognize the new State.

VIENNA CONVENTION http://www.oas.org/legal/spanish/documentos/ConvencionViena.htm

The Vienna Convention on Diplomatic Relations is an international treaty that regulates diplomatic relations between countries and the immunity of diplomatic personnel. It was adopted on April 18, 1961 in Vienna (Austria) and entered into force on April 24, 1964. It was supplemented in 1963 by the Vienna Convention on Consular Relations. 174 States belong to the Convention and in the States that have not signed the document, its provisions apply as customary international law.