Section 16

enter at all reasonable times, with or without assistants, upon any land and remain there so long as is reasonably necessary for the purpose of ascertaining whether any locusts’ eggs or any locusts in the stage in which they are known as hoppers are in or upon the land;

enter, with or without assistants and with such instruments and things (if any) as he considers necessary, upon any land on or in which there are any locusts’ eggs or any locusts in the stage in which they are known as hoppers and may take and cause to be taken thereon any action, whether by means of poison or of mechanical apparatus or otherwise howsoever, which he thinks proper for the destruction of those eggs or locusts:Provided that where the powers mentioned in this paragraph are exercised in pursuance of authority delegated under section 3(4) the action to be taken for the destruction of eggs or locusts shall be restricted to such action as has been expressly authorised in writing by the delegating officer.