A labour code, (also called a code of labour laws) is a codification of labour laws in legislative form. One of the first labour codes was first introduced in 1918 in the Russian Soviet Federative Socialist Republic, as a legal framework underlying the requirement to ensure the right to work declared in the first Soviet Constitution. In the aftermath of post-war the labour codes basing upon the same set of social guarantees were introduced in German Democratic Republic, People's Republic of Hungary, People's Republic of Poland and the other socialist countries in Central and Eastern Europe.