Board of Trustees of the National Provident Fund v Brierley Investments Ltd - [1997] 1 NZLR 1

Property law — Lease — Interpretation — Negotiated terms included that lease "must not contain a ratchet clause" — Provision that "the Lessor may give notice in writing to the Lessee" to initiate three-yearly rent reviews — Whether the agreed exclusion of a "ratchet clause" also excluded the rent review provisions — Whether a "ratchet clause" is equivalent to a clause giving a landlord an option to initiate review proceedings.