This document outlines the hierarchy of labor laws and regulations in Spain. It lists the key sources of labor rules as: 1) the Spanish Constitution, 2) international treaties, 3) laws made by Congress, 4) decrees made by the government, 5) collective agreements signed by worker and employer representatives, and 6) individual labor contracts signed by employers and workers. It also provides vocabulary related to labor roles and regulations and activities to test understanding of how these different sources relate to one another.