RJ Paterson, 1992
In an overview of developments in Conflict of Laws (1990-1992), the author notes Apple Computer Inc v Apple Corps SA  2 NZLR 598, which confirms the rule that a contract, whether lawful in terms of the proper law of the contract or not, will be invalid in so far as performance is unlawful under the lex loci solutionis.
Richard J Howarth, 2004
This article explores choice of law in international commercial contracts with reference to the Lex Mercatoria within the context of unification of international commercial law. The author presents a detailed survey of the origins of the Lex Mercatoria, contemporary arguments supporting its existence, recognition of the Lex Mercatoria in a number of international legal instruments and its modern applications. The uneasy relationship between the Lex Mercatoria and courts in civil code and common law jurisdictions, including New Zealand, is also examined.
Peter Kincaid, 1993
This article focuses on the proper law of the contract with reference to the freedom of parties to choose the governing law, as well as determining the governing law in the absence of a choice by the parties. The author distinguishes between domestic and foreign contracts, the latter excluding all contracts that impinge on New Zealand society on the basis that the characteristic performer habitually resides in New Zealand. Taking the view that contract choice of law should reflect primarily the interests of the parties, with the forum’s public interests playing a secondary role only, the author explores limitations, such as mandatory laws and public policy, on the application of the designated proper law.