GENERAL PART
Chapter III.
Exclusion of penal liability
Article 27. § 1. Whoever acts with the purpose of conducting a cognitive, medical, technical or
economic experiment, shall not commit an offence when the expected benefit is of an essential cognitive, medical or economic importance, and the expectation of these benefits, their purposefulness and the way of conducting the experiment are justified according to the present state of knowledge.
§ 2. An experiment is inadmissible without the consent of a participant subject thereto, duly
informed of the expected benefits and the danger of adverse effects and of the probability of their
occurrence, as well as of the possibility of withdrawing one's participation in the experiments at any stage hereof.
§ 3. The principles and conditions for admitting experiments shall be provided for in law.
Other defences - national proceedings
EDIT.