the State and shall be used in a fair and equitable manner in accordance with national interests. 2. The conditions for the exploitation of the natural resources referred to in item 1 above should lend themselves to the establishment of mandatory financial reserves, in accordance with the law. 3. The exploitation of the natural resources shall preserve the ecological balance and prevent destruction of ecosystems. Section140 (Investments) The State shall promote national investment and establish conditions to attract foreign investment, taking into consideration the national interests, in accordance with the law. Section141 (Land) Ownership, use and development of land as one of the factors for economic production shall be regulated by law. TITLE II FINANCIAL AND TAX SYSTEM Section 142 (Financial system) The structure of the financial system shall be determined by the law in such a way as to guarantee the formation, collection and security of savings, and that the financial resources necessary for economic and social development are provided. Section 143 (Central Bank) 1. The State shall establish a national central bank jointly responsible for the definition and implementation of the monetary and financial policy. 2. The Central Bank functions and its relationship with the National Parliament and the Government shall be established by law, safeguarding the management autonomy of the financial institution. 3. The Central Bank shall have exclusive competence for issuing the national currency.