Germany's top court approved Wednesday some of the world' most rigorous restrictions on genetically modified crops, ruling they were in accordance with the country's constitution. [...] 'Given that the state of knowledge about the long-term consequences of deploying genetic modification is not fully researched, the legislative arm has an especial duty of care,' the court judgement said. Farmers must publicly disclose what seed they used. The court also approved a no-fault-liability rule which obliges a farmer to compensate his neighbours for any loss in market value of their crops if the natural and GM variants become mixed.