It also limits corporate damage claims against unions. Analysts say the Hyundai union's push reflects the law's immediate influence on labor tactics. Hyundai shut down assembly lines Wednesday in Ulsan, Jeonju and Asan for four hours, affecting an estimated 1,500 vehicles, Maeil Daily reported. GM Korea and HD Hyundai shipbuilding unions also staged partial walkouts to protest restructuring moves. Observers warn the law, intended to protect workers from excessive corporate lawsuits, could embolden unions to intervene in management strategy, heightening labor unrest across Korea's key industries, Maeil Business Newspaper reported.