codex. After Genghis Khan Ogedei Khan, the third son of Genghis Khan and the second Great Khan, proclaimed the Great Yassa as an integral body of precedents, confirming the continuing validity of his father's commands and ordinances and added his own. Ogedei codified rules of dress, conduct of the kurultais, the military council. His two immediate successors followed the tradition of the Yassa. The Mongols who lived in various parts of the empire began to add laws that were more appropriate to their areas. Present-day influence In the modern Turkish language (as used presently in Turkey), the word "law" is yasa, and the adjective "legal" is yasal. The word for a constitution, including the Constitution of Turkey, is Anayasa ("mother-law"). Etymology The word yasa or yassa exists in both Mongolic and Turkic languages. It is believed that the word comes from the Mongolian verb zas- or yas- which means "to set in order". Tsereg zasakh is a phrase commonly found in old Mongolian texts like the Secret History that means "to set the soldiers in order" in the sense of rallying the soldiers before a battle. The supreme executive body of the present-day Mongolian government is called the Zasag-in gazar, which means the "place of Zasag", the "place of order". Zasag during the Qing dynasty referred to native provincial governors in Mongolia. The local office called Zasag-in gazar served as a court of the first instance and included secretaries and other officials. The verb zasaglakh means "to govern" in Mongolian. The Turkic verb yas-, which means "to spread", probably originated in Uighur Turkic and was firstly used by Uighur Turks. See also Legal history References Sources Vernadsky, George: "The Mongols and Russia," Yale University Press, 1953, page 102 Vernadsky, George: "The Scope and Content of Chingis Khan's Yasa." Printed in Harvard Journal of Asiatic Studies, Volume 3, 1938, pages 337-360 Akner, Grigor of, History of the Nation of Archers, previously attributed to Maghak'ia the Monk. The Armenian text with English translation by Robert Blake and Richard Frye printed in vol. 12 of the Harvard Journal of Asiatic Studies #3-4 (1949) pp. 269–443 Bar Hebraeus (Abul-Faraj), Makhtbhanuth Zabhne, Chronicon, the second portion, Chronicon Ecclesiasticum. The current edition of the Chronicon Ecclesiasticum is by Jean Baptiste Abbeloos and Thomas Joseph Lamy, Syriac text, Latin translation. Gibb, H.A.R. trans. and ed. (1958), The Travels of Ibn Baṭṭūṭa, A.D. 1325–1354 (Volumes 1-3), London: Hakluyt