Failure to comply with US regulations could see Taiwan firms banned from its supply chains over China-made components, a problem that recently put Unimicron at the center of a Taiwan investigation, media report. The tech giant has been accused of putting ‘Made-in-Taiwan’ labels on some printed circuit boards from its China factories. Taiwan firms have long had supply chains in China, but US tariffs and supply chain regulations have caused changes. The report says Taiwan customs caught 428 violations of the rules as of the end of August, up from 168 at the same time last year, a big increase but mainly due to stricter enforcement.