This question applies mainly to consumer products such as food (including health and supplemental), clothing, pharmaceuticals, cosmetics etc. The major enforcers of these laws are the Canadian Border Services Agency (CBSA – http://www.cbsa-asfc.gc.ca/), the Canadian Food Inspection Agency (CFIA – http://www.inspection.gc.ca/), Health Canada (http://www.hc-sc.gc.ca/), and Innovation, Science and Economic Development Canada (http://www.strategis.ic.gc.ca/).
In general, all labels must only contain information that is truthful and not misleading to the consumer. With extremely limited exemptions such as test marketing, bilingual labelling in English and French is required on all pre-packaged goods sold in Canada.
Consumer Packaging and Labelling Act (www.inspection.gc.ca/english/reg/rege.shtml)
Food and Drugs Act and Regulations (http://www.inspection.gc.ca/english/reg/rege.shtml)
Textile Labelling Act (https://laws-lois.justice.gc.ca/eng/acts/t-10/index.html)
Hazardous Products Act (http://www.hc-sc.gc.ca/ahc-asc/legislation/index_e.html)
For more specific information on Labelling, visit these sites:
Guide to the Consumer Packaging and Labelling Act and Regulations
Consumer Packaging and Labelling regulations (with Search tool)
Guide to Food Labelling and Advertising
Note: For more detailed information, please register with TFOC to access the “Labelling” Section, the “TFOC Exporting to Canada Guide” as well as Market Information Paper(s) specific to your product(s).