Jan McLucas (Queensland, Australian Labor Party, Parliamentary Secretary for Disabilities and Carers) Share this | Hansard source

I will read it again:

… the plain packaging legislation allows for tobacco companies to place an origin mark, which is an alphanumeric code, on the packaging on a voluntary basis to assist the industry in tracking and tracing.

It is on a voluntary basis.

It also allows tobacco companies to continue to use other anticounterfeiting measures such as taggart ink and forensic-level differentiation of packaging materials.