As long as it something carried out between two consenting adults, then it can go ahead. That was the judgment of the British Supreme Court in the recent case involving the prenuptial agreement between German heiress Katrin Radmacher and her investment banker husband, Nicolas Granatino. Granatino had argued against the prenuptial agreement. But law lords upheld its validity and in doing so set a precedent that gives more legal clout to prenuptial agreements. The judgment set out three important aspects which couples considering a prenuptial must follow if that agreement was to have any weight, said Jonathan Mok Chi-ying, a divorce specialist and partner with Mayer Brown JSM. 'The first is independent financial disclosure. Both parties need to know what each other's net worth is so they can't argue 'had I known what you were worth I wouldn't have signed a pre-nuptial agreement',' Mok said. 'Secondly, it is preferable that each party has independent legal representatives, or at least the opportunity to get independent legal advice. The third is that it should be signed as far away from the wedding date as possible to avoid the undue influence and duress argument.' However, although judgments in the UK tend to influence Hong Kong's courts they are not binding, and Hong Kong has not tested the Radmacher agreement in its own courts.