Article 542: If the acts are committed by several members of the army, the applicable penalty shall be military detention for six to twenty years when at least two of the convicts are visibly carrying a weapon or when there are at least eight members of the military acting in concert. The instigators or leaders of the rebellion and the highest ranking member of the military are liable to military detention for life. Section 3: Refusal to obey Article 543: Any soldier who refuses to obey or who, except in cases of force majeure, does not carry out the order received shall be punished by one to two years of military detention. The penalty may be increased to five years if the act takes place either in wartime, or in a territory under siege or emergency, or on board a ship or aircraft. Article 544: Shall be punished by military detention for life any soldier who refuses to obey, when ordered to march against the enemy, the rebels or an armed band or for any other service in the presence of the enemy, the rebels or an armed band. Article 545: Any person in the service of the Armed Forces or employed in an establishment of the Armed Forces who refuses to obey when commanded to do so, either in the presence of the enemy, rebels or an armed band, or in the event of fire or danger threatening the safety of the establishment, a ship or an aircraft, shall be punished by imprisonment for two months to five years. Section 4: Violence and contempt Article 546: Any soldier guilty of violence or assault against a superior shall be punished by six months to three years of military detention. If the convict is an officer, the penalty shall be two to five years of military detention. The penalty shall be five to ten years of military detention if the acts take place while on duty, in the course of duty or on board a ship or aircraft. The penalty may be increased to twenty years of military detention if the acts are committed by a soldier bearing arms. The perpetrators of the above-mentioned acts shall be liable to the penalties provided for in articles 381 and 383 when, due to their consequences, the violence or assault constitutes a more severely punished offense. In all cases where it is not incurred, the stripping off of rank may be pronounced for the offenses provided for in this article. Article 547: Any military person guilty of contempt, by any means whatsoever, towards a superior, shall be punished by two months to two years of military detention.