Garantierne er generelt en arv fra dengang, jernbaneselskaberne var monopolselskaber, inden EØS-aftalen trådte i kraft, og inden markedet for jernbanetjenester blev åbnet for konkurrence.
These guarantees are generally a legacy of special cases of historic monopolies set up for railway undertakings before the EEA Agreement entered into force or before the rail transport services market was opened up to competition.