(1) A person desiring to import, manufacture, sell or otherwise transfer telecommunications equipment, or to install and service such equipment, must obtain a permit as a main supplier, a retail supplier or an installer in accordance with regulations issued by the Minister of Transport and Communications. (2) The activities referred to in sub-article (1) of this Article are open competition activities (Article 2 (h)). (3) A permit issued under this Article shall be subject to such conditions as the Department may specify in the permit, or as may be specified in regulations referred to in the permit. 24. Approval of Telecommunications Equipment (1) The following equipment shall be approved (type approval) by the Department: (a) all radio equipment unless exceptions have been made; and (b) other telecommunications equipment that may be connected to or operated together with public telecommunications networks, or is intended for such use. (2) Approval of telecommunications equipment is, however, not required if the equipment according to its labelling is solely intended for connection to non-public telecommunications networks. (3) All equipment with the same type description as the approved item of` equipment shall be labelled as determined by the Department. 25. Refusal of Approval. Revocation (1) The Department may refuse type approval of telecommunications equipment which does not satisfy the following essential requirements: (a) user safety; (b) safety of the operator's employees; (c) electromagnetic compatibility requirements; (d) protection of the telecommunications networks from harm; (e) effective use of the radio frequency spectrum; (f) interworking of terminal equipment with telecommunications network equipment; (g) interworking of terminal equipment via the telecommunications network in justified cases, and (o) other considerations which the Minister of Transport and Communications may, by regulation, add to this list. (2) The Department may revoke a type approval if the telecommunications equipment or the labelling is altered after the approval is given, if the equipment no longer complies with the essential requirements pursuant to this Article, or if other major pre-conditions for approval no longer apply. (3) Revocation of type approval includes a telecommunications equipment with the same type description, unless the reason for the revocation is that the equipment or the labelling is altered after the date when approval was given. 26. Prohibition of Import, Sale and Use of Telecommunications Equipment (1) It shall be prohibited: (a) to import telecommunications equipment for private use, to offer, to sell, or in any other way transfer telecommunications equipment to others; or (b) to connect telecommunications equipment to public telecommunications networks, and to possess, establish or use such equipment; unless the equipment is type approved.