1) The document discusses various challenges and strategies for complying with Canada's Anti-Spam Legislation (CASL) in different vertical sectors such as software, mobile/telecom, product manufacturing, and online businesses.
2) Key issues addressed include identifying regulated computer program activities, obtaining express consent, developing consent strategies, satisfying disclosure rules, and proving consent.
3) Challenges for the mobile/telecom sector include obtaining consent during device setup processes and the app submission process, while product manufacturers face issues with no direct user interaction.