Section 24
SEC. 24. No person, corporation, association or partnership other than those mentioned in the last preceding section may acquire or own agricultural public land or land of any other denomination or classification, not used for industrial or residence purposes, that is at the time or was originally, really or presumptively, of the public domain, or any permanent improvements thereon, or any real right on such land; and improvement:, Provided, however; That persons, corporation, associations, or partnerships which at the date upon which this Act shall take effect, hold agricultural public lands or land of any other denomination not use for industrial or residence purposes, that belonged originally, really or presumptively, to the public domain, or permanent improvements on such lands, or a real right upon such., lands and improvements, having acquired the same under the laws and regulations in force at the date of such acquisition, shall be authorized to continue holding the same as if such persons, corporations, associations, or partnerships were qualified under the last preceding section; but they shall not encumber, convey, or alienate the same to persons, corporations, associations or partnerships not included in section twenty-three of this Act, except by reason of hereditary succession, duly legalized and acknowledged by competent courts.