EN
The article attempts to define the concept of a public service in transport used in Article 93 of the Treaty on the Functioning of the European Union. Article 93 of the Treaty is the basis for providing public aids for reimbursements for costs incurred as a result of discharge of public services by transport companies. In Poland, those reimbursements are the most common form of public aid in the sector. So that these services are treated as public aids it is necessary to prove that they refer to public services in accordance with the Community law. Still, none of EU legal acts set forth a definition of these services. This leads to various interpretations applied by both Polish authorities and the European Commission and consequently companies that organise public transport have to operate in an unclear legal situation.