Apple's recent decision to ban print subscription tie-ins on iPads may trigger a European investigation into possible accusations of being anti-competitive. Belgium's economy minister Vincent van Quickborne said this week that he would have the low country's Competition Authority investigate whether Apple was overstepping its bounds by requiring that any subscription plans go through iTunes. Moves in both Belgium and the Netherlands could violate antitrust law by preventing publishers from using their own subscription methods, van Quickborne said.