3. Irrespective of being born in a foreign country, children of a Timorese father or mother shall be considered original citizens of East Timor. a) Children of an East Timorese father or mother living overseas; b) Children of an East Timorese father or mother serving the State outside the country; 4. Acquisition, loss and reacquisition of citizenship, as well as its registration and proof, shall be regulated by law. Section 4 (Territory) 1. The territory of the Democratic Republic of East Timor comprises the land surface, the maritime zone and the air space demarcated by the national boundaries that historically comprise the eastern part of Timor Island, the enclave of Oecussi, the island of Ataúro and the islet of Jaco. 2. The extent and limits of territorial waters and the exclusive economic zone, and the rights of East Timor to the adjacent seabed and continental shelf shall be laid down in the law. 3. The State shall not alienate any part of the East Timorese territory or the rights of sovereignty over the land, without prejudice to rectification of borders. Section 5 (Decentralisation) 1. On matters of territorial organisation, the State shall respect the principle of decentralisation of public administration. 2. The law shall determine and establish the characteristics of the different territorial levels and the administrative competencies of the respective organs. 3. Oecussi Ambeno and Ataúro shall enjoy special administrative and economic treatment. Section 6 (Objectives of the State) The fundamental objectives of the State shall be: a) To defend and guarantee the sovereignty of the country;