If the convict is an officer, the penalty shall be from one to five years of military detention and dismissal may, in addition, be pronounced. The penalty shall be from six months to five years of military detention if the acts take place during service, on duty or on board a ship or aircraft. The penalty may be increased to ten years of military detention if the convict is an officer or if the acts are committed by a military person on leave. Article 548: If the violence, assault or contempt is committed without the subordinate knowing the position of his superior, the penalty shall be six days to one year of military detention and a fine of 30,000 to 500,000 francs. Article 549: Subject to the provisions of article 555, insult between military personnel and those of similar rank or between those of similar rank shall be punishable only if there is a relationship of subordination between them as a result of their function or employment. Article 550: Any soldier guilty of violence against a sentry shall be punished by one to five years of military detention. The penalty shall be from ten to twenty years of military detention if he is in possession of a weapon. If the violence is committed in the presence of the enemy, rebels or an armed band, in time of war, in a territory under siege or emergency, in or around an arsenal, a fortress, a powder store, a base or on board a ship, the penalty shall be doubled in the case provided for in the first paragraph of this article. The penalty shall be life imprisonment in the case provided for in the second paragraph. Article 551: Any soldier, who, by any means whatsoever, insults a sentry, shall be punished by six days to six months of military detention. Section 5: Refusal to perform a service due Article 552: Any officer who has received a legitimate request from the civil authority and who refuses or fails to make the forces under his command act shall be punished with one to two years of military detention. Article 553: Any military officer who refuses or who, without legitimate excuse, fails to attend the hearings of the Military Court where he is called to sit shall be punished by two to six months of military detention.