EU still has not adopted a legally binding act regulating administrative proceedings before its all authorities. It brightly contrasts with a long tradition of codification of administrative procedure in the vast majority of EU member states. Furthermore, nowadays we have to deal with a new wave of codifications. It arrives not only to countries with well established achievments like Spain and Portugal in 2015, but extends on those usually reluctant to that kind of provisions. French Code of relations between administration and the public was finally adopted after decades of debates, as an effect of the case law, scholarly pressure and a few proposals. The analysis of factors which led to current state of affairs requires therefore the extensive use of comparative and historical method. However, the results of research can have a crucial importance for understanding of EU administration and may be used in future for amelioration of procedural side of rising global administrative law.