Article 172. Whoever obstructs an action aimed at averting widespread danger to the life or health of many persons or to property of a considerable extent shall be subject to the penalty of the deprivation of liberty for a term of between 3 months to 5 years. Chapter XXI Offences Against Safety in Traffic Article 173. § 1. Whoever causes a catastrophe on land or water or to air traffic which imperils life or health of many persons, or property of a considerable extent shall be subject to the penalty of the deprivation of liberty for a term of between 1 and 10 years. § 2. If the perpetrator acts unintentionally he shall be subject to the penalty of the deprivation of liberty for a term of between 3 months and 5 years. § 3. If the consequence of the act specified in § 1 is the death of a human being or the grievous bodily harm to many persons, the perpetrator shall be subject to the penalty of the deprivation of liberty for a term of between 2 and 12 years. § 4. If the consequence of the act specified in § 2 is the death of a human being or the grievous bodily harm to many persons, the perpetrator shall be subject to the penalty of the deprivation of liberty for a term of between 6 months and 8 years. Article 174. § 1. Whoever causes an immediate danger of a catastrophe on land or water or to air traffic shall be subject to the penalty of the deprivation of liberty for a term of between 6 months and 8 years. § 2. If the perpetrator acts unintentionally he shall be subject to the penalty of deprivation of liberty for up to 3 years. 19