 Chilean Violeta Parra and Argentine Atahualpa Yupanqui were two transitional figures as their mastery of folk music and personal involvement in leftist political organizations aided the eventual union of the two in Nueva canción.The movement was also aided by legislation like Juan Perón's Decreto 3371/1949 de Protección de la Música Nacional and Law No.14,226 which required that half of the music played on the radio or performed live be of national origin.