(1) Subsection 50(1) does not apply in the circumstances (if any) prescribed by the rules.
(2) The rules may prescribe circumstances, and a method for working out the amount in those circumstances, for the purposes of paragraph 50(2)(b).
(3) Rules made for the purposes of subsection (1) or (2) may prescribe circumstances by reference to decisions of the Minister.
(4) Rules prescribing circumstances as mentioned in subsection (1) or (2) cannot be repealed, or amended in a way that removes or limits a prescribed circumstance, without the agreement of each person whose commitment period started while the rules were in force.
(5) Rules prescribing a method for working out an amount as mentioned in subsection (2) cannot be repealed, or amended in a way that results in an increased amount being worked out, without the agreement of each person whose commitment period started while the rules were in force.
(6) Subsections (4) and (5) do not apply to a repeal by operation of section 42 (disallowance) of the Legislation Act 2003 .