The ideas of H. Kelsen have acquired a considerable popularity, their influence can also be seen in Polish jurisprudence of the post-war era. The article touches on some selected problems, which upon an analysis, can reveal the interrelation of concepts of the Polish authors with the theory of law of H. Kelsen. In my opinion the decisional model of law application is a transcription of the Kelsenian ascribing within a politically lawful provisions and the third stage of the model is a close reflection of ascribing within theoretically lawful provisions. The Kelsenian concept of conjugate norms is universally applied in the works of Polish lawyers. Other propositions of the author are essential for the problem of validity of law. ...