Coat of Arms of infante Infante Louis of Spain, as Cardinal and Archbishop of Toledo
Infante Luis used a plain label. See the source below.  The Spanish House of Bourbon had no formal rules for cadency at that time. Royal Family member's arms were created ad-hoc.  The Heir Apparent of Spain frequently used the undifferentiated royal arms, with the title's crown.
Menéndez Pidal y Navascués, Faustino, Hugo. El escudo. P. 248. At Menéndez Pidal y Navascués, Faustino; O´Donnell y Duque de Estrada, Hugo; Lolo, Begoña. Símbolos de España. Madrid: Centro de Estudios Políticos y Constitucionales, 1999. ISBN 84-259-1074-9   *Crowned version image
This vector image includes elements that have been taken or adapted from this file: