(1) The owner of a tea estate may establish nurseries on land not previously planted with tea for the growing of plants intended for infilling or supplying vacancies or for replanting land planted with tea within the area of the estate or for any other purpose approved by the Board.
     (2) All area of land utilised for nurseries in accordance with this section shall be excluded when computing for the purpose of section 13 the total area of land in respect of which the permissions referred to in section 12 may be granted.