confirmation. The procedure and conditions for the issue of such confirmations shall be set forth by the Communications Regulatory Authority. 7. Before terminating an electronic communications activity included in the list of types of electronic communications activities approved by the Communications Regulatory Authority, the undertaking shall notify the Communications Regulatory Authority in accordance with the procedure established thereby. 8. Undertakings seeking to engage or engaged in electronic communications activities shall pay to the Communications Regulatory Authority administrative charges for the services provided and work performed as prescribed by Article 6(3) of this Law. Article 30. Provisions of legal acts establishing the general terms and conditions for engaging in electronic communications activities 1. Common rules of the Communications Regulatory Authority regulating electronic communications activities must be non-discriminatory, transparent and proportional. The Communications Regulatory Authority shall only provide for conditions that are specific to the electronic communications sector and which are not provided for by other legislation. Legal acts establishing the common rules for the electronic communications activities shall provide for the criteria and procedures for imposing obligations on undertakings having significant market power and undertakings, which are authorised to provide universal services, or references shall be made to relevant legislation. 2. The provisions of legal acts adopted by the Communications Regulatory Authority establishing the general terms and conditions for engaging in electronic communications activities may be related only to: 1) terms and conditions for paying financial contributions to the funding of universal service; 2) payment of charges to the Communications Regulatory Authority; 3) compatibility of services and conditions of interconnection of networks; 4) access to telephone numbers given in the national numbering plan, the European Telephone Numbering Space and international freephone telephone numbers and, where technically and economically feasible, other European Union Member States, numbering plan numbers to end-users; 5) implementation of the legal acts relating to environmental protection and territorial planning as well as conditions linked to the granting of the right to use land holdings (landholding) and conditions linked to the sharing of buildings and electronic 54