Article 8 of Competition act, modeled on article 102 TFEU, prohibits the abuse of a dominant position on the market by one or more undertakings in the territory of the Republic of Slovenia, or in a substantial part of it.

Dominance is defined as the ability of an undertaking to act, to a significant degree, independently of competitors, clients or consumers. In addition there is a legal presumption that the undertaking is dominant if its share of the relevant Slovenian market exceeds the 40 per cent threshold and that undertakings are jointly dominant if their share on the relevant Slovenian market exceeds 60 per cent. Determining dominance is assessed with regard not only the market share, CPA takes into consideration also financing options, legal or actual entry barriers, access to suppliers or the market and existing or potential competition.