The legislation would ban cigarette makers from printing their logos, promotional text or colorful images on packs.

Brand names will instead be printed in a small, uniform font and feature large health warnings and gruesome images of cancerous mouths and sickly children.

Hong Kong-based Philip Morris Asia Limited filed a notice of claim on Monday arguing the legislation violates a bilateral investment treaty between Australia and Hong Kong.

The Australian government is defending its plan and says it won’t be intimidated by legal threats.