The amendment to the unit plan required by section 65 must—
(a) define the boundaries of the enlarged or reduced units; and
(b) show any enlarged or reduced unit marked with numbers or letters not already used on the unit plan; and
(c) specify which of the enlarged units and reduced units are principal units and which are accessory units; and
(d) comply with the provisions of rules made under section 49 of the Cadastral Survey Act 2002.