DISPOSICIÓN TRANSITORIA ÚNICA.Single transitional provision En la aplicación de la presente Ley a los títulos nobiliarios concedidos antes de su vigencia se observarán las siguientes normas:In application of the current law to nobility titles awarded before this law came into force, the following norms shall be observed:Las transmisiones del título ya acaecidas no se reputarán inválidas por el hecho de haberse realizado al amparo de la legislación anterior.Transmissions which took place already will not be considered invalid because they were made under the previous law.Not retroactive, then.
Not retroactive, then.
That meant that the crown prince was turned into a prince and his big sister was made crown princess.
The Carlist Wars in Spain were the last major European civil wars in which pretenders fought to establish their claim to a throne. Several times during the period from 1833 to 1876 the Carlists -- followers of Infante Carlos (later Carlos V) and his descendants -- rallied to the cry of "God, Country, and King" and fought for the cause of Spanish tradition (Legitimism and Catholicism) against the liberalism, and later the republicanism, of the Spanish governments of the day.