Apple is set to be fined by the EU under the tough Digital Markets Act (DMA) rules, making it the first company to be sanctioned by the Commission.The European Commission believes Apple is in breach of DMA over its restrictions on App Store developers' communication with users.Violation of DMA rules can lead to fines of up to 10% of a company's annual global turnover.Apple has already faced a hefty financial penalty in Europe, including a €13 billion tax fine.