(1) The regulations may prohibit specified kinds of subleases of an airport lease.
(2) A sublease of an airport lease must not be granted or varied in contravention of those regulations.
(3) If a purported grant or variation contravenes subsection (2), it is of no effect.
(4) If a sublease is in force at the time (the imposition time ) when regulations made for the purposes of subsection (1) impose a prohibition in relation to the sublease:
(a) the prohibition does not have any effect on the validity of the sublease during the 90 - day period beginning at the imposition time; and
(b) if, at the end of that 90 - day period, the sublease contravenes the prohibition--the sublease is terminated immediately after the end of that period.