Acceptability would be assessed during the review process. Linking to the homepage/cover page of the complete guidelines, is likely permissible with the understanding that they are recognized Canadian consensus guidelines. For unbranded ads, the linkage should not contravene the principles outlined in Code section 7.5. There are some scenarios where it could be challenged. As an example, if the unbranded piece speaks to a drug class for which the use is off-label in the guidelines.