Juan Manuel, Prince of Villena
Ferdinand IV promised to cede one sixth of the conquered Granadan territory to the Aragonese crown and therefore chose the entirety of the Kingdom of Almeria as its limits for the agreement with the exception of the towns of , Alcaudete, Quesada, Arenas, and Locubin which would stay as part of Castile, having all previously been part of the Kingdom of Castile and León prior to their Muslim takeovers. Ferdinand IV further stipulated that if the lands taken from the Kingdom of Almería did not amount to one sixth of Granadan territory, that the Archbishop of Toledo would step in to resolve any differences related to the matter. These concessions to the Crown of Aragon led a few of Ferdinand IV's vassals to protest the ratification of the treaty, amongst them were John of Castile and Juan Manuel, Prince of Villena.