The Regulatory Office for Network Industries, according to Act on regulation, issues pre-agreements mainly for the matters of the nomination and contracts on the performance of membership within the advisory board and statutory bodies of the transport network operator and of the person obliged to ensure compliance of the transport network operator, further on, the matters of the conditions for providing the transport network operator´s services to another person being a part of the same vertically integrated gas undertaking, nomination of the person obliged to ensure compliance of the distribution network operator and nomination of the person obliged to ensure compliance of a distribution system operator.