Section 20
SEC. 20. Whenever any owner, tenant, or person in charge of estates or parcels of land has duly notified the proper authorities that his lands are locust infested and is utilizing such forces as are subject to his orders in the actual destruction of locusts on lands subject to his control, said owner, tenant, or person in charge of land may be considered to be complying with the obligation imposed upon him by virtue of this Act, and it shall be unlawful for any officer acting under the provisions of this Act to impress for service in other adjoining or adjacent locust-infested lands any such owner, tenant, or person in charge of said land or any laborer subject to his control who is actually engaged in destroying locusts.