but may not be enforced for small amounts, legal below 0.3% THC
article: Cannabis in Poland Since 2011, prosecutors can choose not to prosecute possession of small quantities of cannabis for personal use if it is a first offense or if the person is drug dependent.
You maybe already asked yourself "Is Cannabis in Poland legal?" In Poland Cannabis (or Marijuana) is illegal for recreational and legal for medical use. About 3.8% of the people in Poland used Cannabis within the last year.