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Switzerland
Practice Relating to Rule 60. Improper Use of the United Nations Emblem or Uniform
Switzerland’s Aide-Memoire on the Ten Basic Rules of the Law of Armed Conflict (2005) states:
Rule 8
I remain fair:
- I shall use the distinctive emblems, white flag and uniform in accordance with the rules (cf. Rule 10). These also protect my comrades and me;
Rule 10
I am familiar with the international protective signs and their meaning. 
Switzerland, The Ten Basic Rules of the Law of Armed Conflict, Aide-memoire 51.007/IIIe, Swiss Army, issued based on Article 10 of the Ordinance for Organization of the Federal Department for Defence, Civil Protection and Sports dated 7 March 2003, entry into force on 1 July 2005, Rules 8 and 10.
The Aide-Memoire also states with regard to the protective signs of the UN: “Prohibited is/are … Any improper use of the distinctive sign.” 
Switzerland, The Ten Basic Rules of the Law of Armed Conflict, Aide-memoire 51.007/IIIe, Swiss Army, issued based on Article 10 of the Ordinance for Organization of the Federal Department for Defence, Civil Protection and Sports dated 7 March 2003, entry into force on 1 July 2005, Chart of Protective Signs.
Switzerland’s Regulation on Legal Bases for Conduct during an Engagement (2005) states:
15.2 Prohibited methods of warfare
223 Misuse of a distinctive sign and the feigning of protected status are prohibited in any place and at any time. …
224 Wearing enemy uniforms or feigning protected status by using the insignia, emblems or uniforms of the United Nations or of neutral States or States that are not party to the conflict is prohibited.
17 Sanctions for violations of the international law of armed conflict
237 The following in particular are criminal offences: improper use of international distinctive signs[.] 
Switzerland, Bases légales du comportement à l’engagement (BCE), Règlement 51.007/IVf, Swiss Army, issued based on Article 10 of the Ordinance on the Organization of the Federal Department for Defence, Civil Protection and Sports of 7 March 2003, entry into force on 1 July 2005, §§ 223–224 and 237.
Switzerland’s Military Criminal Code (1927), taking into account amendments entered into force up to 2011, states in a chapter entitled “War crimes”:
Art. 110
Articles 112–114 apply in the context of international armed conflicts, including in situations of occupation, and, if the nature of the offence does not exclude it, in the context of non-international armed conflicts.
Art. 112c
1 The penalty shall be a custodial sentence of not less than three years for any person who, in the context of an armed conflict:
g. makes improper use … of the flag, the uniform, the military insignia … of the United Nations Organization[.] 
Switzerland, Military Criminal Code, 1927, taking into account amendments entered into force up to 2011, Articles 110 and 112c (1)(g).
Switzerland’s Penal Code (1937), taking into account amendments entered into force up to 2011, states under the title “War crimes”:
Art. 264b
Articles 264d–264j apply in the context of international armed conflicts, including in situations of occupation, and, if the nature of the offence does not exclude it, in the context of non-international armed conflicts.
Art. 264g
1 The penalty shall be a custodial sentence of not less than three years for any person who, in the context of an armed conflict:
g. makes improper use … of the flag, the uniform, the military insignia … of the United Nations Organization[.] 
Switzerland, Penal Code, 1937, taking into account amendments entered into force up to 2011, Articles 264b and 264g (1)(g).
Switzerland’s Law on the Protection of the UN Names and Emblems (1961) provides:
1. It is prohibited, except as authorized by the Secretary-General of the Organization of the United Nations, to use the following signs, belonging to the said organization
a. The name of the organization (in every language);
b. Its acronyms (in official Swiss languages and in English);
c. Its arms, flags and other emblems.
2. The prohibition applies similarly to imitations of the signs referred to in paragraph (1).
Anyone who, intentionally and in violation of the provisions of the present law, has made use of the names, acronyms, arms, flags and other emblems of intergovernmental organizations referred to in article 1 … or of any other signs constituting imitation thereof, … [commits a punishable offence]. 
Switzerland, Law on the Protection of the UN Names and Emblems, 1961, Articles 1 and 7(1).