Final answer:
The proposed Canadian measure to impose stricter controls on imported baby formula is subject to the rules of the World Trade Organization (WTO). Each country is allowed to set its own health and safety standards, as long as they are based on science and do not discriminate between countries. The standards must apply consistently to domestically produced goods and imports from different regions.
Step-by-step explanation:
The rules that come into play in response to the proposed Canadian measure to impose stricter controls on imported baby formula are covered by the World Trade Organization (WTO). According to the WTO, countries are allowed to set their own standards for health and safety regulations. However, these regulations must be based on science and should not discriminate against countries with similar conditions. For example, if the United States passes laws requiring certain safety standards for food products sold in the country, it is legitimate under WTO rules. However, these standards must have a scientific basis and should not be different for domestically produced goods and imports from different regions.