Monitor Prawniczy no. 18/2021 The concept and substance of constitutional transgression as a basis for constitutional accountability before the Tribunal of State Robert Zawłocki 10.32027/MOP.21.18.1 Adoption of resolutions by cooperative governing bodies through direct remote communication means Mateusz Żaba 10.32027/MOP.21.18.2 Defects of Polish obstacles to marriage. Part II – Controversial obstacles to marriage Krystyna Gromek 10.32027/MOP.21.18.3 JPU_ZUS (Single Social Insurance File) – administrative reform of social insurance Antoni Kolek, Oskar Sobolewski Admissibility of a clause providing for contraclual penalties for failure to pay or delay in payment of remuneration due to subcontractors Aleksandra Rudnicka