I want to know the answer to the following question:
What are ISPs subject to monitoring by in some countries?
All the background I'm provided with is that "Internet service providers in many countries are legally required (e.g., via Communications Assistance for Law Enforcement Act (CALEA) in the U.S.) to allow law enforcement agencies to monitor some or all of the information transmitted by the ISP.". Is that enough to answer the question?
Answer: no