(1) Chapter 2 of Part 7 of the Principal Act is amended -

(a) in section 91 by inserting the following after subsection (2):

 "(2A) Notwithstanding subsection (2) (b), subsection (2) (c) shall not apply to an instrument to which subsection (1) applied to the extent that any rent or payment in the nature of rent, for the use of the dwellinghouse or apartment or any part of the dwellinghouse or apartment, is derived -

(a) on or after 5 December 2007, and

(b) after the expiration of a period of 2 years which commences on the date of the execution of the instrument concerned.",

(b) in section 91A -

(i) in subsection (4)(b) by substituting "2 years" for "5 years", and

(ii) by inserting the following after subsection (6):

 "(6A) Notwithstanding subsection (4), subsection (6) shall not apply to an instrument, being an instrument executed before 5 December 2007, to which subsection (3) applied to the extent that any rent or payment in the nature of rent, for the use of the dwellinghouse or apartment or any part of the dwellinghouse or apartment, is derived -