Chapter III, Article 41 of the 1955 Revised Constitution of the Empire of Ethiopia states: "Art. 41. Freedom of speech and of the press is guaranteed throughout the Empire in accordance with the law."

References:

1955 Revised Constitution of the Empire of Ethiopia: Peaslee Amos J.; Xydis, Dorothy Peaslee. Constitutions of Nations. The Hague, M. Nijhoff. https://heinonline-org.proxygw.wrlc.org/HOL/Page?collection=cow&handle=hein.cow/conatio0001&id=192&men_tab=srchresults