In the chapter on State Administration, the Constitution of the Republic of Slovenia situates the National Council in the second place in the system of bodies of national authority. The Constitution defines its:
- Composition (Article 96),
- Powers (Article 97) (or Competences),
- Election (Article 98),
- Decision-making (Article 99),
- Immunity and Incompatibility of Office (Article 100),
- Rules of Procedure (Article 101).
Because the Slovene Constitution is very limited, sometimes even inadequate, in its stipulations regarding the representative body, particularly in relation to the National Council, the legislator was tasked with resolving some important issues. The Constitution stipulates that a special act determines the functioning of the National Council. The National Council Act was thus adopted in 1992 and clarified numerous questions that should have been constitutionally defined. The National Council Act arranged also some important aspects of the relationship between both chambers, as it is a segmental law that primarily regulates elections of the National Council and its organisation. Because the legislation on the National Council is also inadequate, numerous questions must be answered by Rules of Procedure of both chambers. Hence, the organisation and functioning of the National Council are also determined by Rules of Procedure of the National Council, whereas the relationship between the National Assembly and the National Council is determined by Rules of Procedure of the National Assembly.
- Act on determining of electoral units for elections of representatives of local interests in the National Council,
- Referendum and Popular Initiative Act,
- The Constitutional Court Act,
- Parliamentary Inquiries Act,
- Rules of Procedure of Parliamentary Inquiries,
- Ethical code of the National Council of the Republic of Slovenia,
- Officials in the State Administration Bodies Act,
- Integrity and Prevention of Corruption Act.