Anneliese today voted in the European Parliament for compulsory checks on the sources of minerals imported from conflict zones.
These minerals are used for components in many household electrical items, including laptops and mobile phones.
Under the new proposals, companies must make reasonable checks to ensure the step behind them in the supply chain can verify where the product came from, which will help break the link between armed conflict and the minerals trade.
Voluntary guidelines have been in place for years in Europe and have been taken up by very few businesses.
Anneliese said: "I'm pleased that the European Parliament has decided to support our proposals to tighten up the rules on conflict minerals. It's not enough just to tighten up regulations on the smelters -- in order to stamp out conflict minerals across the EU, we need these tougher rules which make it mandatory for suppliers to ask questions about where the minerals they buy are coming from. We should be able to be sure that the items we buy won't be funding conflict and human rights abuses."
David Martin MEP, member of the European Parliament international trade committee and Labour's European spokesperson on conflict minerals, said: "We have seen enough of bleeding hearts within the Conservatives. What we need is action to turn the minerals curse into a blessing - yet David Cameron's party refuse to support effective action on blood minerals.
"A mandatory scheme is absolutely vital and I am extremely pleased the European Parliament has supported these proposals by the S&D Group. There have been voluntary guidelines in place for five years and more than 80 per cent of companies have chosen not to publish any information on their supply chain due diligence.
"These mandatory requirements, while not burdensome on any one link in the supply chain, will make a huge difference to those on the ground in conflict areas. We now need the support of EU Member State governments to reach an agreement on this legislation."