Related Rule
Czech Republic
Practice Relating to Rule 63. Use of Flags or Military Emblems, Insignia or Uniforms of Neutral or Other States Not Party to the Conflict
The Czech Republic’s Criminal Code (1961), as amended in 1999, punishes any “person who, in time of war, misuses … the flag … or military emblem, or the insignia or uniform of a neutral country or another country … which is not a party to the conflict”. 
Czech Republic, Criminal Code, 1961, as amended in 1999, Article 265(2).