Article 16 (Scope and interpretation of fundamental rights) (1) The fundamental rights contained in this Constitution shall not exclude any other fundamental rights provided for in the laws or resulting from applicable rules of international law. (2) The provisions of this Constitution and of laws relating to fundamental rights shall be construed and interpreted in harmony with the Universal Declaration of Human Rights. Article 18 (Legal force) (1) The constitutional precepts with regard to rights, freedoms and guarantees are directly applicable and are binding on public and private entities. (2) Rights, freedoms and guarantees may be restricted by law in only those cases expressly provided for in this Constitution; restrictions shall be limited to the extent necessary to safeguard other rights or interests protected by this Constitution. (3) Laws restricting rights, freedoms and guarantees shall be general and abstract in character, shall not have retroactive effect and shall not limit, in extent or scope, the essential content of the constitutional provisions.