Article 19 The operator of a telecommunications network is obligated to guarantee that its users are free to choose other telecommunications networks to meet their telecommunications needs. Article 20 Every telecommunications operator is obligated to give priority to the transmission, distribution and conveyance of important information relating to: a. state security; b. safety of human life and property; c. natural disasters; d. grave danger; and/or e. epidemics. Article 21 A telecommunications operator is prohibited from engaging in telecommunications operations business, which violates the public interest, morals, security or public order. Article 22 Any person is prohibited from committing unlawful, illegal actions or manipulate a. access to telecommunications networks; and/or b. access to telecommunications services; and/or c. access to special telecommunications networks. Part Six Numbering Article 23 (1) In operating telecommunications networks and telecommunications services, a numbering system shall be determined and used. (2) The numbering system referred to in paragraph (1) shall be determined by the Minister.