(1) The Minister is responsible for determining the rent payable for a holding when it is granted or renewed.
(2) The Secretary is responsible for redetermining or adjusting the rent for a holding during the term of the holding if a provision of this Act or the holding requires or permits it to be done.
(3) The Secretary is to redetermine or adjust the rent for a holding during the term of the holding in accordance with the provisions of this Part unless the provisions of the holding provide differently.
(4) A provision of a holding (whether granted before or after the commencement of this Part) that provides for the Minister to redetermine or adjust its rent is to be read in all cases (including for the purposes of subsection (2)) as providing for the Secretary to do it instead of the Minister.