Where in the opinion of the Board it is desirable that steps should be taken for the purpose of controlling or eradicating nassella tussock on any land, but undue hardship would be imposed on the owner by requiring him to comply with any notice served on him under section eight of this Act in respect of that land, the Board may, with the written consent of the Minister, and subject to such conditions as he may impose, enter into an agreement with the owner whereby the Board may sow or plant or maintain trees, shrubs, plants, or grasses on the land, or may spray or do any other act or thing to eradicate nassella tussock from that land or control it on that land; and may erect and maintain fences to protect any such trees, shrubs, plants, or grasses:

“Provided that no trees shall be planted under any such agreement without the written consent of the Minister of Forests or otherwise than in accordance with such conditions, if any, as he thinks fit to impose in granting his consent.

The cost of any work carried out by the Board under this section and not payable or recoverable from the owner of the land in terms of the agreement entered into between the Board and the owner shall be paid out of moneys appropriated by Parliament for the purposes of this section and shall not form part of the annual estimate of expenditure of the Board under section thirty-five of this Act.”