Section 8
SEC. 8. Only those lands shall be declared open to disposition or concession which have been officially delimited and classified and, when practicable, surveyed, and which have not been reserved for public or quasi-public uses, nor appropriated by the Government, nor in any manner become private property, nor those on which a private right authorized and recognized by this Act or any other valid law may be claimed, or which, having been reserved or appropriated, have ceased to be so However, the President may, for reasons of public interest, declare lands of the public domain open to disposition before the same have had their boundaries established or been surveyed, or may, for the same reason, suspend their concession or disposition until they are again declared open to concession or disposition by proclamation duly published or by Act of the National Assembly.