With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Similar to the law of Canada, the U.S. law (27 CFR 5.22 (g)) says that tequila must be "manufactured in Mexico in compliance with the laws of Mexico regulating the manufacture of Tequila for consumption in that country". Tequila is usually sold in the U.S. at 40% alcohol concentration (80 U.S. proof), but there are no legal restrictions on the level of alcohol, so long as the other laws are followed.
text_B: If a more mellow 60-proof tequila was developed in Mexico, does this passage suggest that it could legally be sold in Canada (or at least, not mention any barrier to its sale in that nation)?
YES.