Section 44. Any natural-born citizen of the Philippines who is not the owner of more than twelve (12) hectares and who, for at least thirty (30) years prior to the effectivity of this amendatory Act, has continuously occupied and cultivated, either by himself or through his predecessors-in-interest a tract or tracts of agricultural public lands subject to disposition, who shall have paid the real estate tax thereon while the same has not been occupied by any person shall be entitled, under the provisions of this Chapter, to have a free patent issued to him for such tract or tracts of such land not to exceed twelve (12) hectares.