The crisis of sub-Saharan immigrants in Ceuta has revealed the diplomatic crisis between Spain and Morocco that has been entrenched for years. Morocco, despite the passage of time, continues to claim Ceuta and Melilla and, as a tool to achieve this, uses migratory pressure. Spain has integrated the territories into its Constitution, but Rabat maintains that they are Moroccan territories subjected to Spanish occupation and presents its claim as a matter of territorial integrity.
However, geographical proximity does not alone determine the sovereignty of a territory. The Spanish position has an accumulation of historical titles, treaties, effective exercise of public power, and constitutional integration that Morocco has not managed to counteract with an equivalent legal title.
A Spanish presence for centuries
The history of Ceuta and Melilla is not linked to the Spanish Protectorate established over part of Morocco in the 20th century. Both cities were already under Iberian sovereignty several centuries earlier.
Ceuta was conquered by Portugal in 1415. When Portugal regained its independence from the Hispanic Monarchy in 1640, the city remained linked to the Spanish Crown. The Treaty of Lisbon of 1668, which ended the war between Spain and Portugal, confirmed that Ceuta remained in the hands of Spain. The documentation of the Autonomous City itself dates its incorporation to the Spanish Crown in 1640.
Melilla, for its part, came under Spanish control in 1497, after the expedition led by Pedro de Estopiñán for the Duke of Medina Sidonia. Since then it has remained under Spanish administration, first as a fortified plaza and later as a fully integrated part of the territorial organization of the State.
Morocco signed treaties that classified them as Spanish
One of the main obstacles to the Moroccan position lies in the very agreements signed by its sovereigns.
The Treaty of Peace and Friendship signed by Spain and Morocco in Tetuán on April 26, 1860 expressly refers to the "Spanish plazas of Ceuta and Melilla". The text established the limits, neutral zones, and the obligation of Moroccan authorities to prevent attacks against the territories subjected to Spanish sovereignty.
The treaty did not create sovereignty over the two cities from scratch: it started from the premise that they were already Spanish and mainly regulated their boundaries and surrounding lands. This circumstance makes it difficult to maintain that Morocco never accepted or recognized the existence of Spanish sovereignty.
The international principle "pacta sunt servanda" establishes that every treaty in force obliges the parties and must be performed in good faith. The Vienna Convention on the Law of Treaties codified this principle, although it was already recognized as a general norm of international law.
Two cities fully integrated into Spain
The Spanish Constitution expressly recognizes Ceuta and Melilla within the territorial organization of the State. Its fifth transitory provision contemplates their access to autonomy and reserves their own representation for both cities in the Cortes Generales.
The Statutes of Autonomy approved in 1995 are even clearer. The first article of both defines Ceuta and Melilla as "integral part of the Spanish Nation and within its indissoluble unity". Their inhabitants elect their own assemblies, participate in Spanish and European elections, and are subject to the same judicial and constitutional institutions as the rest of the country.
The European Union also regulates both cities as Spanish territories, although they are subject to particular fiscal, customs, and border peculiarities. The Schengen Borders Code expressly includes the special rules applicable to "the cities of Ceuta and Melilla" within the Spanish regime.
A unilateral claim does not create sovereignty
Morocco formally recorded its position by ratifying in 2007 the United Nations Convention on the Law of the Sea. In its declaration, it classified Ceuta and Melilla as Moroccan territories under Spanish occupation and asserted that it had never renounced recovering them.
Spain responded to the United Nations depositary in 2008, stating that the two cities are an integral part of the Kingdom of Spain and that it exercises full sovereignty over them. The statements reflect the existence of opposing positions, but the Moroccan unilateral claim does not in itself generate a new territorial title.
A political claim without an equivalent title
Morocco can invoke geographical continuity, its own interpretation of history, and its project of territorial integrity. These are political and geostrategic arguments, but they do not replace a legal title.
Spain has centuries of continued sovereignty, treaties that expressly designate both cities as Spanish, effective administration, constitutional integration, and the absence of any decolonization mandate from the United Nations.
Therefore, Morocco does not have a legal basis capable of prevailing over the title and effective exercise of sovereignty of Spain.