Some thoughts, concerning the system of one of the main branches of Ukrainian law — Administrative Law, have been expresses in the article. The groups of norms that can form the institutes of the General Part of the Administrative Law have been distinguished. The latter include the institutes: 1) of the principles of administrative law; 2) of subjective public rights and obligations; 3) of the powers of public administration; 4) of the administrative procedure; 5) of public service and 6) administrative liability. The justification for merging these norms with aforementioned institutions has been provided. The position on the criteria for grouping the norms of the Special Part of Administrative Law has been stated. It has been proposed to distinguish sub-sectors in the Special Section, in which rules on the powers of public administration to perform service and management functions in a clearly defined sphere and the particulars of the procedure for their (powers) implementation will be presented.