You know already that the government intervenes when it isn't strictly a health reason. There already are labels that are not solely health-based. They can be based on what we call “organic” features. They may have to do with health, ethics and the environment. There are labels based on religious considerations, including labels to indicate if something is “halal” or “kosher”. Currently, the government doesn't regulate just health.
As for your question about the industry, we have seen, as I said in my presentation, that if we let the market self-regulate, it won't work. Voluntary labelling has been around since 2004 and, as far as I know, no company has knowingly indicated on its product that it contains GMOs. Ultimately, it is a basic right that must be respected by the Canadian government.