Article 15.5.6.

The operator does not need to bear the costs of remediation measures taken on the grounds of this title, if he demonstrates that:

  1. he was not at fault or negligent;
  2. the environmental damage was caused by emissions or activities or any way in which a product is used during an activity, where the operator is able to prove that, based on the state of scientific and technological knowledge at the time at which they took place, they were not considered harmful.