Complex sentence: The unanimous decision held that the state's prohibitions on same-sex marriage were a violation of rights granted by the Vermont Constitution and ordered the Vermont legislature to either allow same-sex marriages or implement an alternative legal mechanism according similar rights.
Split into simpler sentences: The unanimous decision found that existing prohibitions on same-sex marriage were a violation of rights granted by the Vermont Constitution. As a result, the Vermont legislature was ordered to either allow same-sex marriages, or implement an alternative legal mechanism according similar rights.