used or useful for the purpose of providing wireless telecommunications services; Telecommunications service Public telecommunications Services Any service normally provided for consideration whether on a retail or wholesale basis which consists wholly or mainly in telecommunications; and Telecommunications service available to the public; Telecommunications Telecommunications Transmission, reception or emission of signals representing symbols, writing, images, sounds or information of any nature through wires, optical systems, radio-electrical means and other electromagnetic systems; and Timor Telecom Timor Telecom, S.A., a joint stock company established under the laws of Timor-Leste. CHAPTER II NATIONAL COMMUNICATIONS AUTHORITY Article 4 Establishment and Nature 1. The present Decree-Law establishes the National Communications Authority. 2. The Authority is a public institute with legal personality, vested with administrative and financial autonomy and its own budget and assets, and has as its purpose to act as the regulatory entity for the telecommunications sector. 3. The Authority shall take on its functions, duties and obligations upon the Chairperson or interim Chairperson commencing his or her term of office. Article 5 Functions, Obligations and Powers 1. The Authority shall have the following powers: a) Pursuing the objectives and accomplishing the provisions contained in the present Decree-Law; b) Monitoring and regulating the Timor-Leste telecommunications sector pursuant to the present Decree-Law;