The central theme of this paper is theoretical consideration of the concept of regulations and their classification. The regulations are the general legal acts of the executive branch, which, by special procedure, are adopted by these bodies.It can be a government (in a parliamentary system) or a head of state (in the presidential and some semi-presidential systems). In most legal systems on the hierarchical scale of the regulation, they are placed under the constitution and laws, and above other by-laws. It is possible to differentiate law enforcement regulations (these are general and executive regulations) as well as regulations on the need. Instead of the conclusion, the authors pay attention to the concept and categorization of regulations in the constitutional system of Serbia
