London: The biggest derivatives industry group urged European Union and UK policymakers to agree on a transitional period after Brexit for derivative contracts governed by English law to avoid stoking uncertainty and higher costs.

The International Swaps and Derivatives Association’s master agreements are written according to English, New York and Japanese laws, with English rules governing the “vast majority” of cross-border trades in Europe, ISDA said. The system allows counterparties to choose the legal framework and the court that will settle disputes at the start of their relationship, giving them confidence a ruling will be enforced.

“Absent a transitional agreement between the UK and the EU providing safeguards for choice of law, choice of forum and the cross-border recognition of such elections, enforcement of court judgements could be lengthy and costly,” ISDA said in a paper on Monday. “Transitional arrangements should provide for the continued application of the rules for automatic mutual recognition and enforceability of judgements.”

A regulation known as Brussels 1 allows automatic recognition of judgements and determines which courts have jurisdiction in legal disputes between companies in EU member states. In leaving the EU, the UK will also leave that legal system, which offers a scope and a level of protection that isn’t available under other frameworks, ISDA said.

‘Major effort’

Bank resolution rules also make a transition period advisable, ISDA said. English law contracts are subject to the EU’s bail-in principles, which benefit from mutual recognition by other European states, meaning there’s no need to amend the agreements. When the UK becomes a third country, that mutual recognition will vanish.

“Given the number of English law agreements entered into between EU and UK counterparties, it would require a major effort to insert such bank resolution regime clauses,” according to the ISDA paper. “This would be expensive and time-consuming, hence the need for preservation of mutual recognition of bank resolution regimes during any transitional period.”

The same arguments apply to corporate insolvency regimes, ISDA said. Mutual recognition of these arrangements avoids reliance on the patchwork of rules and procedures that would otherwise apply, boosting costs and reducing returns for stakeholders, ISDA said.

UK and EU policymakers should “remove any legal uncertainty over cross-border English law contracts by designing transitional arrangements to be put in place after the UK leaves the EU until a proper system of mutual recognition is introduced,” the group said.