Prawo Zamówień Publicznych no. 4/2020 The Reform of US defence and security acquisitions in Section 809 Panel recommendations Michał Kania Modyfikacja umowy o zamówienie publiczne w obliczu epidemii COVID-19 Wojciech Robaczyński Reserved contracts in light of the new normative solutions Maciej Lubiszewski Shaping the criteria of procurement offers under the new PPL Małgorzata Stręciwilk On the legal role of CJEU case law in the area of public procurement Hanna Drynkorn Changes in court and arbitration proceedings against the background of professionalising public procurement Michał Drozdowicz Popularising good practice in public procurement Piotr Bogdanowicz Z problematyki dobrych obyczajów i zasad etyki w zamówieniach publicznych Witold Małecki Professionalisation of officials – the role of associations Franciszek Łapecki Granting public procurement contracts during the COVID-19 epidemic Agnieszka Piwowarczyk Effective control of public procurement by regional chambers of auditors – selected issues Małgorzata Moras Practical aspects of using self-cleaning institutions in public procurement Aldona Kowalczyk On certain aspects of the electronisation of public procurement in view of the case law of the National Appeals Chamber Żaneta Urbaniak