Section 4
SEC. 4. Abolition of Agricultural Share Tenancy.&mdashAgricultural share tenancy, as herein defined, is hereby declared to be contrary to public policy and shall be abolished: Provided, That existing share tenancy contracts may continue in force and effect in any region or locality, to be governed in the by meantime the pertinent provisions of Republic Act Numbered.Eleven hundred and ninety-nine, as amended, until the end of the agricultural year when the National Land Reform Council proclaims that all the government machineries and agencies in that region or locality relating to leasehold envisioned in this Code are operating, unless such contracts provide for a shorter period or the tenant sooner exercises his option to elect the leasehold system: Provided, further, That in order not to jeopardize international commitments, lands devoted to crops covered by marketing allotments shall be made the subject of a separate proclamation that adequate provisions, such as the organization of cooperatives, marketing agreements, or other similar workable arrangements, have been made to insure efficient management on all matters requiring synchronization of the agricultural with the processing phases of such crops: Provided, furthermore, That where the agricultural share tenancy contract has ceased to be operative by virtue of this Code, or where such a tenancy contract has been entered into in violation of the provisions of this Code and is, therefore, null and void, and the tenant continues in possession of the land for cultivation, there shall be presumed to exist a leasehold relationship under the provisions of this Code, without prejudice to the right of the landowner and the former tenant to enter into any other lawful contract in relation to the land formerly under tenancy contract, as long as in the interim the security of tenure of the former tenant under Republic Act Numbered Eleven hundred and ninety-nine, as amended, and as provided in this Code, is not impaired: Provided, finally, That if a lawful leasehold tenancy contract was entered into prior to the effectivity of this Code, the rights and obligations arising therefrom shall continue to subsist until modified by the parties in accordance with the provisions of this Code.