Darlington Futures Ltd v Delco Australia Pty Ltd

Darlington Futures Ltd (the appellant broker) and Delco Australia Pty Ltd (the respondent client) were parties to a dispute concerning unauthorised dealings on the commodity futures market. The client alleged that the broker had engaged in unauthorised transactions, and the broker sought to rely on exclusion and limitation clauses within their contract to limit its liability. The matter was heard by the High Court of Australia.

The central legal issue before the High Court was the interpretation of the exclusion and limitation clauses in the brokerage contract. Specifically, the court had to determine whether these clauses effectively excluded or limited the broker's liability for the unauthorised transactions, given that these transactions were found to be substantially connected with the broker-client relationship established by the contract.

The High Court applied the *contra proferentem* rule of contractual interpretation, which dictates that ambiguous clauses are construed against the party who drafted them. The court reasoned that the exclusion and limitation clauses, while broadly worded, did not clearly and unambiguously extend to cover the unauthorised dealings in question. The unauthorised transactions, though connected to the overall relationship, were not within the scope of the authority contemplated by the contract, and therefore the clauses did not operate to protect the broker from liability for these specific actions. The court found that the clauses were intended to cover authorised dealings, not unauthorised ones that fell outside the scope of the contractual mandate.