Original sentence: Spanish royal authority over Gibraltar continues to be formally asserted through the nearby municipality of San Roque in the Campo de Gibraltar.The title continued to be used by his successors even after the territory was ceded to the Crown of Great Britain in perpetuity under the terms of the Treaty of Utrecht of 1713, emphasizing the Spanish viewpoint that Britain merely enjoyed possession of Gibraltar, rather than sovereignty over it
Edited sentence: Spanish royal authority over Gibraltar continues to be theoretically asserted through the nearby municipality of San Roque in the Campo de Gibraltar.The title continued to be used by his successors even after the territory was ceded to the Crown of Great Britain in perpetuity under the terms of the Treaty of Utrecht of 1713,