9 The legislation provides (relevantly) as follows:-
Part 1 Preliminary Definitions
(1) In this Schedule:
principal place of residence exemption - see clause 2.
residential land - see clause 3.
...
taxing date - means midnight on the thirty-first day of December.
(2) For the purposes of this Schedule, a reference to the owner of land includes, if there are joint owners, any one or more of those joint owners.
Part 2 Principal place of residence exemption
2 Principal place of residence exemption
(1) Land used and occupied by the owner as the principal place of residence of the owner of the land, and for no other purpose, is exempt from taxation under this Act, in respect of the year commencing 1 January 2005 or any succeeding year, if the land is:
(a) a parcel of residential land, or
(b) a strata lot or, subject to this Schedule, land comprised of 2 or more strata lots.
(2) Land is not used and occupied as the principal place of residence of a person unless:
(a) the land, and no other land, has been continuously used and occupied by the person for residential purposes and for no other purposes since 1 July in the year preceding the tax year in which land tax is levied, or
(b) in any other case, the Chief Commissioner is satisfied that the land is used and occupied by the person as the person's principal place of residence.
(3) If the owner of land is entitled to the exemption conferred by this clause, no other person is liable to be assessed for taxation under this Act in respect of the land during the period of the owner's entitlement to the exemption.
(4) The exemption conferred by this clause is referred to as the principal place of residence exemption.
(5) The principal place of residence exemption is subject to the restrictions set out in Part 4.
3 Residential land - meaning
(1) In this Schedule, residential land means land that is used and occupied for residential purposes and for no other purpose, that use and occupation being use and occupation of a building or buildings designed, constructed or adapted for residential purposes, other than a building or buildings:
(a) comprised of strata lots or residential units, or
(b) containing (out of the total of all rooms in the building or buildings) occupancies other than that of the owner, or
(c) from any part of which income is derived.
.....
13 Application of exemption to residence comprised of 2 or more lots (other than strata lots)
(1) The principal place of residence exemption does not extend to a parcel of residential land that is comprised of 2 or more lots of land, and that is used and occupied by the owner of the lots (or by one of them) as a principal place of residence, unless:
(a) the lots are adjoining, and
(b) the lots are in the same ownership, and
(c) the lots are the site of a single residence (excluding any additional residential occupancy that may be disregarded under clause 4).
(1A) Lots are in the same ownership if:
(a) the lots are owned by the same person or, if any of the lots are jointly owned, the lots are all jointly owned by the same persons, or
(b) each lot is beneficially owned by the same person or, if any of the lots have more than one beneficial owner, each lot is beneficially owned by the same persons (subject to clause 11).
(2) For the purposes of this clause:
....
(a1) separate lots that are divided by a fence, wall or other structure are not to be regarded as adjoining unless access is readily available between the lots, by means of gates, doors, steps, stiles, elevators or openings or by similar means ...."