The article discusses prohibited acts classified in Article 66 of the Act of 15 January 2015 on the protection of animals used for scientific or educational purposes. The crime under Article 66(1.1) consists in the exposure of animals to unnecessary pain, suffering, distress or permanent damage to their body in connection with the activity that involves using animals for scientific or educational purposes and is a material one. The object of an act is an animal, although a plural form is used in the Act (“whoever exposes animals”). It is an individual crime that may only be committed intentionally (with both forms of intent). The essence of an offence under Article 66(1.2) is the use of animals in experiment-related procedures without obtaining appropriate permission in connection with the activity that involves using animals for scientific or educational purposes. It is a formal crime and only a person conducting experiments or a person responsible for their conducting can be a perpetrator (individual crime). The subjective aspect is expressed in intentionality (direct or oblique intent). A circumstance classifying the aggravated type (Article 66(2)) is an animal’s death resulting from undertaking activities laid down in Article 66(1.1) or (1.2). It is a material crime (an animal’s death is the effect) and an individual one. However, it is not a crime aggravated by the result because the legislator does not use a phrase “if an act results in”, which means that culpa dolo exorta is not applicable. However, on the part of a perpetrator, there must be intentionality, such as direct intent (he wanted an animal to die) or oblique intent (predicting the possibility of an animal’s death, he agreed to it). If an animal’s death is not intentional on the part of a perpetrator, his liability is limited to Article 66(1) APAUSEP.