Prawo Zamówień Publicznych no. 2/2021 Making Changes to the Subject of a Public Contract Krzysztof Horubski The principle of fair competition in the context of new public procurement regulations Maria Królikowska-Olczak On the need for further improvements in negotiated procedures Maciej Lubiszewski The grounds for excluding an unreliable contractor under the new Public Procurement Law from the perspective of case-law Magdalena Grabarczyk Basic rules of civil procedure in proceedings before the National Appeals Chamber Joanna May Types of appeals to the National Appeals Chamber Żaneta Urbaniak Current problems with costing constructions in the public procurement system Balbina Kacprzyk, Andrzej Warwas, Andrzej Borowicz Quality requirements when describing the subject matter of the contract Franciszek Łapecki On the defectiveness of construction works justifying the contractor’s liability under warranty Jolanta Loranc-Borkowska The role of the president of the Public Procurement Office in the public procurement system and in the public administration structure Izabela Oleksy-Piesik Changes in the public procurement process in Germany, in light of rules on electronic invoicing within the European Union Anna Bawół Commencement of the period of a contractor’s exclusion from public procurement due to participating in bid-rigging Commentary to the judgment of the Court of Justice of the EU of 24 October 2018 in case file No. C-124/17, Vossloh Laeis Michał Drozdowicz VIII ogólnopolska konferencja naukowa „Nowe prawo zamówień publicznych – konsekwencje i trudności wdrożeniowe” Karol Brózda