Westfield Management Limited as Trustee for the Westart Trust v AMP Capital Property Nominees Limited as Nominee of Unisuper Limited in its Capacity as Trustee of the Complying Superannuation Fund Known as Unisuper

Westfield Management Limited as Trustee for the Westart Trust (Westfield) and AMP Capital Property Nominees Limited as Nominee of Unisuper Limited in its Capacity as Trustee of the Complying Superannuation Fund Known as Unisuper (AMP) were parties to a dispute concerning the interpretation of a retail lease agreement. The case was heard in the High Court of Australia.

The central legal issue before the High Court was whether AMP, as the landlord, was entitled to recover from Westfield, as the tenant, a proportion of the costs incurred in carrying out structural repairs to the common property of a shopping centre. This involved determining the proper construction of clause 11.1 of the retail lease, which dealt with the tenant's liability for outgoings, and specifically whether the costs of structural repairs fell within the definition of "outgoings" or were to be borne by the landlord.

The High Court considered the principles of contractual interpretation, particularly in the context of commercial leases. Their Honours analysed the language of clause 11.1, including the definitions of "outgoings" and "capital expenditure," in light of the overall scheme of the lease. The Court concluded that the costs of structural repairs, being of a capital nature and not falling within the specific inclusions of the outgoings clause, were not recoverable from the tenant under the lease. The reasoning focused on the distinction between recurring operational expenses and significant capital works, finding that the latter were not intended to be passed on to the tenant unless expressly provided for.

The appeal was allowed, and the orders of the lower courts were set aside.