On February 28, 2013 Łukasz Wieczorek delivered a lecture for participants of the workshop entitled „Contracts in energy and gas sector. The latest legal regulations”, which was held in Warsaw on 27-28 February 2013. The workshop was organized by training firm Nowoczesna Firma. Łukasz Wieczorek presented a lecture on “Inadmissible clauses in contracts for energy sector”. The workshop was directed, in particular, to representatives of undertakings operating in the electricity, heat and gas sectors.