(1) The Minister may, by written notice given to the lessee of a petroleum retention lease granted under section 141A, vary the lease by imposing one or more conditions to which the lease is subject.
(2) A notice under subsection (1) must be given within 14 days after the grant of the lease.
(3) A variation under subsection (1) takes effect on the day on which notice of the variation is given to the lessee.